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Finding the Fourth Proportional to 21,904.20, 32,859.90 and 9,430.20

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Solution

The fourth proportional to 21,904.20, 32,859.90 and 9,430.20 is: 14,146.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.20 : 32,859.90 = 9,430.20 : x
  2. Step 2: Convert to fraction form
    21,904.20/32,859.90 = 9,430.20/x
  3. Step 3: Cross multiply
    21,904.20x = 32,859.90 × 9,430.20
  4. Step 4: Simplify right side
    21,904.20x = 309,875,428.98
  5. Step 5: Solve for x
    x = 309,875,428.98/21,904.20
  6. Step 6: Final answer
    x = 14,146.85

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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.