Home / 31,543.52-47,312.40-18,387.68

Finding the Fourth Proportional to 31,543.52, 47,312.40 and 18,387.68

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Solution

The fourth proportional to 31,543.52, 47,312.40 and 18,387.68 is: 27,579.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,543.52 : 47,312.40 = 18,387.68 : x
  2. Step 2: Convert to fraction form
    31,543.52/47,312.40 = 18,387.68/x
  3. Step 3: Cross multiply
    31,543.52x = 47,312.40 × 18,387.68
  4. Step 4: Simplify right side
    31,543.52x = 869,965,271.23
  5. Step 5: Solve for x
    x = 869,965,271.23/31,543.52
  6. Step 6: Final answer
    x = 27,579.84

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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.