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Finding the Fourth Proportional to 10,368,865.80, 15,553,298.70 and 9,781,000.20

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Solution

The fourth proportional to 10,368,865.80, 15,553,298.70 and 9,781,000.20 is: 14,671,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,368,865.80 : 15,553,298.70 = 9,781,000.20 : x
  2. Step 2: Convert to fraction form
    10,368,865.80/15,553,298.70 = 9,781,000.20/x
  3. Step 3: Cross multiply
    10,368,865.80x = 15,553,298.70 × 9,781,000.20
  4. Step 4: Simplify right side
    10,368,865.80x = 152,126,817,695,359.72
  5. Step 5: Solve for x
    x = 152,126,817,695,359.72/10,368,865.80
  6. Step 6: Final answer
    x = 14,671,500.30

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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.