Home / 8,712.07-12,019.51-5,175.20

Finding the Fourth Proportional to 8,712.07, 12,019.51 and 5,175.20

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Solution

The fourth proportional to 8,712.07, 12,019.51 and 5,175.20 is: 7,139.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.07 : 12,019.51 = 5,175.20 : x
  2. Step 2: Convert to fraction form
    8,712.07/12,019.51 = 5,175.20/x
  3. Step 3: Cross multiply
    8,712.07x = 12,019.51 × 5,175.20
  4. Step 4: Simplify right side
    8,712.07x = 62,203,368.15
  5. Step 5: Solve for x
    x = 62,203,368.15/8,712.07
  6. Step 6: Final answer
    x = 7,139.91

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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.