Home / 31,378.16-47,030.12-13,811.28

Finding the Fourth Proportional to 31,378.16, 47,030.12 and 13,811.28

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Solution

The fourth proportional to 31,378.16, 47,030.12 and 13,811.28 is: 20,700.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,378.16 : 47,030.12 = 13,811.28 : x
  2. Step 2: Convert to fraction form
    31,378.16/47,030.12 = 13,811.28/x
  3. Step 3: Cross multiply
    31,378.16x = 47,030.12 × 13,811.28
  4. Step 4: Simplify right side
    31,378.16x = 649,546,155.75
  5. Step 5: Solve for x
    x = 649,546,155.75/31,378.16
  6. Step 6: Final answer
    x = 20,700.58

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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.