Home / 31,128.04-42,948.66-18,543.88

Finding the Fourth Proportional to 31,128.04, 42,948.66 and 18,543.88

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Solution

The fourth proportional to 31,128.04, 42,948.66 and 18,543.88 is: 25,585.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,128.04 : 42,948.66 = 18,543.88 : x
  2. Step 2: Convert to fraction form
    31,128.04/42,948.66 = 18,543.88/x
  3. Step 3: Cross multiply
    31,128.04x = 42,948.66 × 18,543.88
  4. Step 4: Simplify right side
    31,128.04x = 796,434,797.20
  5. Step 5: Solve for x
    x = 796,434,797.20/31,128.04
  6. Step 6: Final answer
    x = 25,585.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.