Home / 31,710.40-47,578.86-13,931.88

Finding the Fourth Proportional to 31,710.40, 47,578.86 and 13,931.88

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Solution

The fourth proportional to 31,710.40, 47,578.86 and 13,931.88 is: 20,903.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,710.40 : 47,578.86 = 13,931.88 : x
  2. Step 2: Convert to fraction form
    31,710.40/47,578.86 = 13,931.88/x
  3. Step 3: Cross multiply
    31,710.40x = 47,578.86 × 13,931.88
  4. Step 4: Simplify right side
    31,710.40x = 662,862,968.06
  5. Step 5: Solve for x
    x = 662,862,968.06/31,710.40
  6. Step 6: Final answer
    x = 20,903.65

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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.