Home / 9,159.18-12,639.95-5,180.22

Finding the Fourth Proportional to 9,159.18, 12,639.95 and 5,180.22

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Solution

The fourth proportional to 9,159.18, 12,639.95 and 5,180.22 is: 7,148.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,159.18 : 12,639.95 = 5,180.22 : x
  2. Step 2: Convert to fraction form
    9,159.18/12,639.95 = 5,180.22/x
  3. Step 3: Cross multiply
    9,159.18x = 12,639.95 × 5,180.22
  4. Step 4: Simplify right side
    9,159.18x = 65,477,695.89
  5. Step 5: Solve for x
    x = 65,477,695.89/9,159.18
  6. Step 6: Final answer
    x = 7,148.86

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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.