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Finding the Fourth Proportional to 19,909.70, 29,857.35 and 10,045.70

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Solution

The fourth proportional to 19,909.70, 29,857.35 and 10,045.70 is: 15,064.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,909.70 : 29,857.35 = 10,045.70 : x
  2. Step 2: Convert to fraction form
    19,909.70/29,857.35 = 10,045.70/x
  3. Step 3: Cross multiply
    19,909.70x = 29,857.35 × 10,045.70
  4. Step 4: Simplify right side
    19,909.70x = 299,937,980.90
  5. Step 5: Solve for x
    x = 299,937,980.90/19,909.70
  6. Step 6: Final answer
    x = 15,064.92

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1.5x scale

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.