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Finding the Fourth Proportional to 28,773,221.95, 39,706,581.67 and 15,720,199.93

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Solution

The fourth proportional to 28,773,221.95, 39,706,581.67 and 15,720,199.93 is: 21,693,622.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,773,221.95 : 39,706,581.67 = 15,720,199.93 : x
  2. Step 2: Convert to fraction form
    28,773,221.95/39,706,581.67 = 15,720,199.93/x
  3. Step 3: Cross multiply
    28,773,221.95x = 39,706,581.67 × 15,720,199.93
  4. Step 4: Simplify right side
    28,773,221.95x = 624,195,402,389,273.25
  5. Step 5: Solve for x
    x = 624,195,402,389,273.25/28,773,221.95
  6. Step 6: Final answer
    x = 21,693,622.06

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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.