Home / 28,167.23-38,870.19-15,420.11

Finding the Fourth Proportional to 28,167.23, 38,870.19 and 15,420.11

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Solution

The fourth proportional to 28,167.23, 38,870.19 and 15,420.11 is: 21,279.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,167.23 : 38,870.19 = 15,420.11 : x
  2. Step 2: Convert to fraction form
    28,167.23/38,870.19 = 15,420.11/x
  3. Step 3: Cross multiply
    28,167.23x = 38,870.19 × 15,420.11
  4. Step 4: Simplify right side
    28,167.23x = 599,382,411.17
  5. Step 5: Solve for x
    x = 599,382,411.17/28,167.23
  6. Step 6: Final answer
    x = 21,279.43

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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.