Home / 21,031,142.40-31,559,155.20-15,337,036.80

Finding the Fourth Proportional to 21,031,142.40, 31,559,155.20 and 15,337,036.80

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Solution

The fourth proportional to 21,031,142.40, 31,559,155.20 and 15,337,036.80 is: 23,014,628.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031,142.40 : 31,559,155.20 = 15,337,036.80 : x
  2. Step 2: Convert to fraction form
    21,031,142.40/31,559,155.20 = 15,337,036.80/x
  3. Step 3: Cross multiply
    21,031,142.40x = 31,559,155.20 × 15,337,036.80
  4. Step 4: Simplify right side
    21,031,142.40x = 484,023,924,679,311.38
  5. Step 5: Solve for x
    x = 484,023,924,679,311.38/21,031,142.40
  6. Step 6: Final answer
    x = 23,014,628.28

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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.