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Finding the Fourth Proportional to 21,458.72, 32,188.08 and 17,505.72

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Solution

The fourth proportional to 21,458.72, 32,188.08 and 17,505.72 is: 26,258.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,458.72 : 32,188.08 = 17,505.72 : x
  2. Step 2: Convert to fraction form
    21,458.72/32,188.08 = 17,505.72/x
  3. Step 3: Cross multiply
    21,458.72x = 32,188.08 × 17,505.72
  4. Step 4: Simplify right side
    21,458.72x = 563,475,515.82
  5. Step 5: Solve for x
    x = 563,475,515.82/21,458.72
  6. Step 6: Final answer
    x = 26,258.58

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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.