Home / 19,761.48-27,280.80-15,275.10

Finding the Fourth Proportional to 19,761.48, 27,280.80 and 15,275.10

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Solution

The fourth proportional to 19,761.48, 27,280.80 and 15,275.10 is: 21,087.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,761.48 : 27,280.80 = 15,275.10 : x
  2. Step 2: Convert to fraction form
    19,761.48/27,280.80 = 15,275.10/x
  3. Step 3: Cross multiply
    19,761.48x = 27,280.80 × 15,275.10
  4. Step 4: Simplify right side
    19,761.48x = 416,716,948.08
  5. Step 5: Solve for x
    x = 416,716,948.08/19,761.48
  6. Step 6: Final answer
    x = 21,087.33

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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.