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Finding the Fourth Proportional to 31,566.80, 47,350.20 and 18,412.40

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Solution

The fourth proportional to 31,566.80, 47,350.20 and 18,412.40 is: 27,618.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,566.80 : 47,350.20 = 18,412.40 : x
  2. Step 2: Convert to fraction form
    31,566.80/47,350.20 = 18,412.40/x
  3. Step 3: Cross multiply
    31,566.80x = 47,350.20 × 18,412.40
  4. Step 4: Simplify right side
    31,566.80x = 871,830,822.48
  5. Step 5: Solve for x
    x = 871,830,822.48/31,566.80
  6. Step 6: Final answer
    x = 27,618.60

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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.