Home / 21,965.02-30,312.15-12,406.84

Finding the Fourth Proportional to 21,965.02, 30,312.15 and 12,406.84

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Solution

The fourth proportional to 21,965.02, 30,312.15 and 12,406.84 is: 17,121.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,965.02 : 30,312.15 = 12,406.84 : x
  2. Step 2: Convert to fraction form
    21,965.02/30,312.15 = 12,406.84/x
  3. Step 3: Cross multiply
    21,965.02x = 30,312.15 × 12,406.84
  4. Step 4: Simplify right side
    21,965.02x = 376,077,995.11
  5. Step 5: Solve for x
    x = 376,077,995.11/21,965.02
  6. Step 6: Final answer
    x = 17,121.68

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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.