Home / 20,475.16-30,686.80-9,947.58

Finding the Fourth Proportional to 20,475.16, 30,686.80 and 9,947.58

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Solution

The fourth proportional to 20,475.16, 30,686.80 and 9,947.58 is: 14,908.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,475.16 : 30,686.80 = 9,947.58 : x
  2. Step 2: Convert to fraction form
    20,475.16/30,686.80 = 9,947.58/x
  3. Step 3: Cross multiply
    20,475.16x = 30,686.80 × 9,947.58
  4. Step 4: Simplify right side
    20,475.16x = 305,259,397.94
  5. Step 5: Solve for x
    x = 305,259,397.94/20,475.16
  6. Step 6: Final answer
    x = 14,908.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.