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Finding the Fourth Proportional to 21,905.30, 32,870.60 and 9,254.10

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Solution

The fourth proportional to 21,905.30, 32,870.60 and 9,254.10 is: 13,886.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.30 : 32,870.60 = 9,254.10 : x
  2. Step 2: Convert to fraction form
    21,905.30/32,870.60 = 9,254.10/x
  3. Step 3: Cross multiply
    21,905.30x = 32,870.60 × 9,254.10
  4. Step 4: Simplify right side
    21,905.30x = 304,187,819.46
  5. Step 5: Solve for x
    x = 304,187,819.46/21,905.30
  6. Step 6: Final answer
    x = 13,886.49

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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.