Home / 28,491.19-39,316.11-15,744.08

Finding the Fourth Proportional to 28,491.19, 39,316.11 and 15,744.08

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Solution

The fourth proportional to 28,491.19, 39,316.11 and 15,744.08 is: 21,725.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.19 : 39,316.11 = 15,744.08 : x
  2. Step 2: Convert to fraction form
    28,491.19/39,316.11 = 15,744.08/x
  3. Step 3: Cross multiply
    28,491.19x = 39,316.11 × 15,744.08
  4. Step 4: Simplify right side
    28,491.19x = 618,995,981.13
  5. Step 5: Solve for x
    x = 618,995,981.13/28,491.19
  6. Step 6: Final answer
    x = 21,725.87

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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.