Home / 31,223.68-43,080-18,643.84

Finding the Fourth Proportional to 31,223.68, 43,080 and 18,643.84

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Solution

The fourth proportional to 31,223.68, 43,080 and 18,643.84 is: 25,723.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,223.68 : 43,080 = 18,643.84 : x
  2. Step 2: Convert to fraction form
    31,223.68/43,080 = 18,643.84/x
  3. Step 3: Cross multiply
    31,223.68x = 43,080 × 18,643.84
  4. Step 4: Simplify right side
    31,223.68x = 803,176,627.20
  5. Step 5: Solve for x
    x = 803,176,627.20/31,223.68
  6. Step 6: Final answer
    x = 25,723.32

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1.5x scale

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.