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Finding the Fourth Proportional to 21,969.60, 32,931.13 and 7,174.55

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Solution

The fourth proportional to 21,969.60, 32,931.13 and 7,174.55 is: 10,754.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.60 : 32,931.13 = 7,174.55 : x
  2. Step 2: Convert to fraction form
    21,969.60/32,931.13 = 7,174.55/x
  3. Step 3: Cross multiply
    21,969.60x = 32,931.13 × 7,174.55
  4. Step 4: Simplify right side
    21,969.60x = 236,266,038.74
  5. Step 5: Solve for x
    x = 236,266,038.74/21,969.60
  6. Step 6: Final answer
    x = 10,754.23

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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.