Home / 20,756.68-31,117.56-9,657.72

Finding the Fourth Proportional to 20,756.68, 31,117.56 and 9,657.72

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Solution

The fourth proportional to 20,756.68, 31,117.56 and 9,657.72 is: 14,478.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.68 : 31,117.56 = 9,657.72 : x
  2. Step 2: Convert to fraction form
    20,756.68/31,117.56 = 9,657.72/x
  3. Step 3: Cross multiply
    20,756.68x = 31,117.56 × 9,657.72
  4. Step 4: Simplify right side
    20,756.68x = 300,524,681.56
  5. Step 5: Solve for x
    x = 300,524,681.56/20,756.68
  6. Step 6: Final answer
    x = 14,478.46

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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.