Home / 20,323.13-28,030.19-15,531.17

Finding the Fourth Proportional to 20,323.13, 28,030.19 and 15,531.17

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Solution

The fourth proportional to 20,323.13, 28,030.19 and 15,531.17 is: 21,420.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,323.13 : 28,030.19 = 15,531.17 : x
  2. Step 2: Convert to fraction form
    20,323.13/28,030.19 = 15,531.17/x
  3. Step 3: Cross multiply
    20,323.13x = 28,030.19 × 15,531.17
  4. Step 4: Simplify right side
    20,323.13x = 435,341,428.22
  5. Step 5: Solve for x
    x = 435,341,428.22/20,323.13
  6. Step 6: Final answer
    x = 21,420.99

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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.