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Finding the Fourth Proportional to 21,402.60, 29,468.49 and 19,434.30

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Solution

The fourth proportional to 21,402.60, 29,468.49 and 19,434.30 is: 26,758.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.60 : 29,468.49 = 19,434.30 : x
  2. Step 2: Convert to fraction form
    21,402.60/29,468.49 = 19,434.30/x
  3. Step 3: Cross multiply
    21,402.60x = 29,468.49 × 19,434.30
  4. Step 4: Simplify right side
    21,402.60x = 572,699,475.21
  5. Step 5: Solve for x
    x = 572,699,475.21/21,402.60
  6. Step 6: Final answer
    x = 26,758.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.