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Finding the Fourth Proportional to 21,754.55, 32,612.99 and 12,971.01

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Solution

The fourth proportional to 21,754.55, 32,612.99 and 12,971.01 is: 19,445.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,754.55 : 32,612.99 = 12,971.01 : x
  2. Step 2: Convert to fraction form
    21,754.55/32,612.99 = 12,971.01/x
  3. Step 3: Cross multiply
    21,754.55x = 32,612.99 × 12,971.01
  4. Step 4: Simplify right side
    21,754.55x = 423,023,419.42
  5. Step 5: Solve for x
    x = 423,023,419.42/21,754.55
  6. Step 6: Final answer
    x = 19,445.28

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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.