Home / 12,128,436.30-18,192,654.45-8,709,499.20

Finding the Fourth Proportional to 12,128,436.30, 18,192,654.45 and 8,709,499.20

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Solution

The fourth proportional to 12,128,436.30, 18,192,654.45 and 8,709,499.20 is: 13,064,248.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,436.30 : 18,192,654.45 = 8,709,499.20 : x
  2. Step 2: Convert to fraction form
    12,128,436.30/18,192,654.45 = 8,709,499.20/x
  3. Step 3: Cross multiply
    12,128,436.30x = 18,192,654.45 × 8,709,499.20
  4. Step 4: Simplify right side
    12,128,436.30x = 158,448,909,378,151.41
  5. Step 5: Solve for x
    x = 158,448,909,378,151.41/12,128,436.30
  6. Step 6: Final answer
    x = 13,064,248.80

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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.