Home / 8,709.53-12,020.18-5,172.74

Finding the Fourth Proportional to 8,709.53, 12,020.18 and 5,172.74

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Solution

The fourth proportional to 8,709.53, 12,020.18 and 5,172.74 is: 7,139.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.53 : 12,020.18 = 5,172.74 : x
  2. Step 2: Convert to fraction form
    8,709.53/12,020.18 = 5,172.74/x
  3. Step 3: Cross multiply
    8,709.53x = 12,020.18 × 5,172.74
  4. Step 4: Simplify right side
    8,709.53x = 62,177,321.71
  5. Step 5: Solve for x
    x = 62,177,321.71/8,709.53
  6. Step 6: Final answer
    x = 7,139.00

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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.