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Finding the Fourth Proportional to 15,660,072.80, 21,974,490.40 and 15,660,072.80

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Solution

The fourth proportional to 15,660,072.80, 21,974,490.40 and 15,660,072.80 is: 21,974,490.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660,072.80 : 21,974,490.40 = 15,660,072.80 : x
  2. Step 2: Convert to fraction form
    15,660,072.80/21,974,490.40 = 15,660,072.80/x
  3. Step 3: Cross multiply
    15,660,072.80x = 21,974,490.40 × 15,660,072.80
  4. Step 4: Simplify right side
    15,660,072.80x = 344,122,119,406,901.12
  5. Step 5: Solve for x
    x = 344,122,119,406,901.12/15,660,072.80
  6. Step 6: Final answer
    x = 21,974,490.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.