Home / 21,000,709.10-31,438,078.05-12,476,657.90

Finding the Fourth Proportional to 21,000,709.10, 31,438,078.05 and 12,476,657.90

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Solution

The fourth proportional to 21,000,709.10, 31,438,078.05 and 12,476,657.90 is: 18,677,566.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000,709.10 : 31,438,078.05 = 12,476,657.90 : x
  2. Step 2: Convert to fraction form
    21,000,709.10/31,438,078.05 = 12,476,657.90/x
  3. Step 3: Cross multiply
    21,000,709.10x = 31,438,078.05 × 12,476,657.90
  4. Step 4: Simplify right side
    21,000,709.10x = 392,242,144,863,349.12
  5. Step 5: Solve for x
    x = 392,242,144,863,349.12/21,000,709.10
  6. Step 6: Final answer
    x = 18,677,566.70

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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.