Home / 15,124.97-20,870.16-8,663.60

Finding the Fourth Proportional to 15,124.97, 20,870.16 and 8,663.60

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Solution

The fourth proportional to 15,124.97, 20,870.16 and 8,663.60 is: 11,954.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,124.97 : 20,870.16 = 8,663.60 : x
  2. Step 2: Convert to fraction form
    15,124.97/20,870.16 = 8,663.60/x
  3. Step 3: Cross multiply
    15,124.97x = 20,870.16 × 8,663.60
  4. Step 4: Simplify right side
    15,124.97x = 180,810,718.18
  5. Step 5: Solve for x
    x = 180,810,718.18/15,124.97
  6. Step 6: Final answer
    x = 11,954.45

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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.