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Finding the Fourth Proportional to 21,425.68, 32,133.66 and 7,574.68

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Solution

The fourth proportional to 21,425.68, 32,133.66 and 7,574.68 is: 11,360.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,425.68 : 32,133.66 = 7,574.68 : x
  2. Step 2: Convert to fraction form
    21,425.68/32,133.66 = 7,574.68/x
  3. Step 3: Cross multiply
    21,425.68x = 32,133.66 × 7,574.68
  4. Step 4: Simplify right side
    21,425.68x = 243,402,191.73
  5. Step 5: Solve for x
    x = 243,402,191.73/21,425.68
  6. Step 6: Final answer
    x = 11,360.30

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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.