Home / 21,002,191.60-31,440,301.80-12,478,140.40

Finding the Fourth Proportional to 21,002,191.60, 31,440,301.80 and 12,478,140.40

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Solution

The fourth proportional to 21,002,191.60, 31,440,301.80 and 12,478,140.40 is: 18,679,788.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,191.60 : 31,440,301.80 = 12,478,140.40 : x
  2. Step 2: Convert to fraction form
    21,002,191.60/31,440,301.80 = 12,478,140.40/x
  3. Step 3: Cross multiply
    21,002,191.60x = 31,440,301.80 × 12,478,140.40
  4. Step 4: Simplify right side
    21,002,191.60x = 392,316,500,078,772.75
  5. Step 5: Solve for x
    x = 392,316,500,078,772.75/21,002,191.60
  6. Step 6: Final answer
    x = 18,679,788.64

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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.