Home / 21,006,000.10-31,509,000.15-12,481,948.90

Finding the Fourth Proportional to 21,006,000.10, 31,509,000.15 and 12,481,948.90

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Solution

The fourth proportional to 21,006,000.10, 31,509,000.15 and 12,481,948.90 is: 18,722,923.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006,000.10 : 31,509,000.15 = 12,481,948.90 : x
  2. Step 2: Convert to fraction form
    21,006,000.10/31,509,000.15 = 12,481,948.90/x
  3. Step 3: Cross multiply
    21,006,000.10x = 31,509,000.15 × 12,481,948.90
  4. Step 4: Simplify right side
    21,006,000.10x = 393,293,729,762,392.31
  5. Step 5: Solve for x
    x = 393,293,729,762,392.31/21,006,000.10
  6. Step 6: Final answer
    x = 18,722,923.35

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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.