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Finding the Fourth Proportional to 7,157,650, 9,877,557 and 3,938,386

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Solution

The fourth proportional to 7,157,650, 9,877,557 and 3,938,386 is: 5,434,972.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,157,650 : 9,877,557 = 3,938,386 : x
  2. Step 2: Convert to fraction form
    7,157,650/9,877,557 = 3,938,386/x
  3. Step 3: Cross multiply
    7,157,650x = 9,877,557 × 3,938,386
  4. Step 4: Simplify right side
    7,157,650x = 38,901,632,203,002
  5. Step 5: Solve for x
    x = 38,901,632,203,002/7,157,650
  6. Step 6: Final answer
    x = 5,434,972.68

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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.