Home / 31,080.24-42,897.36-20,470.80

Finding the Fourth Proportional to 31,080.24, 42,897.36 and 20,470.80

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Solution

The fourth proportional to 31,080.24, 42,897.36 and 20,470.80 is: 28,254.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,080.24 : 42,897.36 = 20,470.80 : x
  2. Step 2: Convert to fraction form
    31,080.24/42,897.36 = 20,470.80/x
  3. Step 3: Cross multiply
    31,080.24x = 42,897.36 × 20,470.80
  4. Step 4: Simplify right side
    31,080.24x = 878,143,277.09
  5. Step 5: Solve for x
    x = 878,143,277.09/31,080.24
  6. Step 6: Final answer
    x = 28,254.07

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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.