Home / 15,531.10-21,413.20-10,491.88

Finding the Fourth Proportional to 15,531.10, 21,413.20 and 10,491.88

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Solution

The fourth proportional to 15,531.10, 21,413.20 and 10,491.88 is: 14,465.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.10 : 21,413.20 = 10,491.88 : x
  2. Step 2: Convert to fraction form
    15,531.10/21,413.20 = 10,491.88/x
  3. Step 3: Cross multiply
    15,531.10x = 21,413.20 × 10,491.88
  4. Step 4: Simplify right side
    15,531.10x = 224,664,724.82
  5. Step 5: Solve for x
    x = 224,664,724.82/15,531.10
  6. Step 6: Final answer
    x = 14,465.47

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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.