Home / 31,387.78-47,081.73-7,695.43

Finding the Fourth Proportional to 31,387.78, 47,081.73 and 7,695.43

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Solution

The fourth proportional to 31,387.78, 47,081.73 and 7,695.43 is: 11,543.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,387.78 : 47,081.73 = 7,695.43 : x
  2. Step 2: Convert to fraction form
    31,387.78/47,081.73 = 7,695.43/x
  3. Step 3: Cross multiply
    31,387.78x = 47,081.73 × 7,695.43
  4. Step 4: Simplify right side
    31,387.78x = 362,314,157.49
  5. Step 5: Solve for x
    x = 362,314,157.49/31,387.78
  6. Step 6: Final answer
    x = 11,543.16

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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.