Home / 21,006,810.48-28,991,705.28-12,188,204.40

Finding the Fourth Proportional to 21,006,810.48, 28,991,705.28 and 12,188,204.40

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Solution

The fourth proportional to 21,006,810.48, 28,991,705.28 and 12,188,204.40 is: 16,821,060.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006,810.48 : 28,991,705.28 = 12,188,204.40 : x
  2. Step 2: Convert to fraction form
    21,006,810.48/28,991,705.28 = 12,188,204.40/x
  3. Step 3: Cross multiply
    21,006,810.48x = 28,991,705.28 × 12,188,204.40
  4. Step 4: Simplify right side
    21,006,810.48x = 353,356,829,857,199.25
  5. Step 5: Solve for x
    x = 353,356,829,857,199.25/21,006,810.48
  6. Step 6: Final answer
    x = 16,821,060.49

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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.