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Finding the Fourth Proportional to 12,938,818.80, 19,374,013.80 and 10,368,073.20

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Solution

The fourth proportional to 12,938,818.80, 19,374,013.80 and 10,368,073.20 is: 15,524,693.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938,818.80 : 19,374,013.80 = 10,368,073.20 : x
  2. Step 2: Convert to fraction form
    12,938,818.80/19,374,013.80 = 10,368,073.20/x
  3. Step 3: Cross multiply
    12,938,818.80x = 19,374,013.80 × 10,368,073.20
  4. Step 4: Simplify right side
    12,938,818.80x = 200,871,193,256,210.16
  5. Step 5: Solve for x
    x = 200,871,193,256,210.16/12,938,818.80
  6. Step 6: Final answer
    x = 15,524,693.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.