Home / 31,986.40-47,979.15-14,456.20

Finding the Fourth Proportional to 31,986.40, 47,979.15 and 14,456.20

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Solution

The fourth proportional to 31,986.40, 47,979.15 and 14,456.20 is: 21,684.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,986.40 : 47,979.15 = 14,456.20 : x
  2. Step 2: Convert to fraction form
    31,986.40/47,979.15 = 14,456.20/x
  3. Step 3: Cross multiply
    31,986.40x = 47,979.15 × 14,456.20
  4. Step 4: Simplify right side
    31,986.40x = 693,596,188.23
  5. Step 5: Solve for x
    x = 693,596,188.23/31,986.40
  6. Step 6: Final answer
    x = 21,684.10

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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.