Home / 8,707.80-12,018.28-5,172.96

Finding the Fourth Proportional to 8,707.80, 12,018.28 and 5,172.96

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Solution

The fourth proportional to 8,707.80, 12,018.28 and 5,172.96 is: 7,139.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.80 : 12,018.28 = 5,172.96 : x
  2. Step 2: Convert to fraction form
    8,707.80/12,018.28 = 5,172.96/x
  3. Step 3: Cross multiply
    8,707.80x = 12,018.28 × 5,172.96
  4. Step 4: Simplify right side
    8,707.80x = 62,170,081.71
  5. Step 5: Solve for x
    x = 62,170,081.71/8,707.80
  6. Step 6: Final answer
    x = 7,139.59

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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.