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Finding the Fourth Proportional to 12,985,801.20, 19,485,700.20 and 5,413,532.40

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Solution

The fourth proportional to 12,985,801.20, 19,485,700.20 and 5,413,532.40 is: 8,123,216.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985,801.20 : 19,485,700.20 = 5,413,532.40 : x
  2. Step 2: Convert to fraction form
    12,985,801.20/19,485,700.20 = 5,413,532.40/x
  3. Step 3: Cross multiply
    12,985,801.20x = 19,485,700.20 × 5,413,532.40
  4. Step 4: Simplify right side
    12,985,801.20x = 105,486,469,369,386.48
  5. Step 5: Solve for x
    x = 105,486,469,369,386.48/12,985,801.20
  6. Step 6: Final answer
    x = 8,123,216.10

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1.5x scale

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.