Home / 21,039,981.60-31,559,972.40-12,082,029.60

Finding the Fourth Proportional to 21,039,981.60, 31,559,972.40 and 12,082,029.60

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Solution

The fourth proportional to 21,039,981.60, 31,559,972.40 and 12,082,029.60 is: 18,123,044.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039,981.60 : 31,559,972.40 = 12,082,029.60 : x
  2. Step 2: Convert to fraction form
    21,039,981.60/31,559,972.40 = 12,082,029.60/x
  3. Step 3: Cross multiply
    21,039,981.60x = 31,559,972.40 × 12,082,029.60
  4. Step 4: Simplify right side
    21,039,981.60x = 381,308,520,711,983
  5. Step 5: Solve for x
    x = 381,308,520,711,983/21,039,981.60
  6. Step 6: Final answer
    x = 18,123,044.40

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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.