Home / 21,312,981.60-31,969,472.40-13,660,231.20

Finding the Fourth Proportional to 21,312,981.60, 31,969,472.40 and 13,660,231.20

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Solution

The fourth proportional to 21,312,981.60, 31,969,472.40 and 13,660,231.20 is: 20,490,346.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312,981.60 : 31,969,472.40 = 13,660,231.20 : x
  2. Step 2: Convert to fraction form
    21,312,981.60/31,969,472.40 = 13,660,231.20/x
  3. Step 3: Cross multiply
    21,312,981.60x = 31,969,472.40 × 13,660,231.20
  4. Step 4: Simplify right side
    21,312,981.60x = 436,710,384,326,018.81
  5. Step 5: Solve for x
    x = 436,710,384,326,018.81/21,312,981.60
  6. Step 6: Final answer
    x = 20,490,346.80

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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.