Home / 15,318.06-21,140.32-8,947.74

Finding the Fourth Proportional to 15,318.06, 21,140.32 and 8,947.74

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Solution

The fourth proportional to 15,318.06, 21,140.32 and 8,947.74 is: 12,348.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.06 : 21,140.32 = 8,947.74 : x
  2. Step 2: Convert to fraction form
    15,318.06/21,140.32 = 8,947.74/x
  3. Step 3: Cross multiply
    15,318.06x = 21,140.32 × 8,947.74
  4. Step 4: Simplify right side
    15,318.06x = 189,158,086.88
  5. Step 5: Solve for x
    x = 189,158,086.88/15,318.06
  6. Step 6: Final answer
    x = 12,348.70

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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.