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Finding the Fourth Proportional to 21,061,353.70, 29,549,668.10 and 21,061,353.70

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Solution

The fourth proportional to 21,061,353.70, 29,549,668.10 and 21,061,353.70 is: 29,549,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061,353.70 : 29,549,668.10 = 21,061,353.70 : x
  2. Step 2: Convert to fraction form
    21,061,353.70/29,549,668.10 = 21,061,353.70/x
  3. Step 3: Cross multiply
    21,061,353.70x = 29,549,668.10 × 21,061,353.70
  4. Step 4: Simplify right side
    21,061,353.70x = 622,356,011,571,707
  5. Step 5: Solve for x
    x = 622,356,011,571,707/21,061,353.70
  6. Step 6: Final answer
    x = 29,549,668.10

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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.