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Finding the Fourth Proportional to 21,402.60, 32,103.90 and 19,215.60

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Solution

The fourth proportional to 21,402.60, 32,103.90 and 19,215.60 is: 28,823.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.60 : 32,103.90 = 19,215.60 : x
  2. Step 2: Convert to fraction form
    21,402.60/32,103.90 = 19,215.60/x
  3. Step 3: Cross multiply
    21,402.60x = 32,103.90 × 19,215.60
  4. Step 4: Simplify right side
    21,402.60x = 616,895,700.84
  5. Step 5: Solve for x
    x = 616,895,700.84/21,402.60
  6. Step 6: Final answer
    x = 28,823.40

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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.