Home / 21,817,395,965.80-30,108,749,312.12-12,661,215,900.91

Finding the Fourth Proportional to 21,817,395,965.80, 30,108,749,312.12 and 12,661,215,900.91

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Solution

The fourth proportional to 21,817,395,965.80, 30,108,749,312.12 and 12,661,215,900.91 is: 17,472,909,055.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,817,395,965.80 : 30,108,749,312.12 = 12,661,215,900.91 : x
  2. Step 2: Convert to fraction form
    21,817,395,965.80/30,108,749,312.12 = 12,661,215,900.91/x
  3. Step 3: Cross multiply
    21,817,395,965.80x = 30,108,749,312.12 × 12,661,215,900.91
  4. Step 4: Simplify right side
    21,817,395,965.80x = 381,213,375,547,063,468,032
  5. Step 5: Solve for x
    x = 381,213,375,547,063,468,032/21,817,395,965.80
  6. Step 6: Final answer
    x = 17,472,909,055.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.