Home / 9,159.21-12,639.65-5,180.36

Finding the Fourth Proportional to 9,159.21, 12,639.65 and 5,180.36

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Solution

The fourth proportional to 9,159.21, 12,639.65 and 5,180.36 is: 7,148.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,159.21 : 12,639.65 = 5,180.36 : x
  2. Step 2: Convert to fraction form
    9,159.21/12,639.65 = 5,180.36/x
  3. Step 3: Cross multiply
    9,159.21x = 12,639.65 × 5,180.36
  4. Step 4: Simplify right side
    9,159.21x = 65,477,848.17
  5. Step 5: Solve for x
    x = 65,477,848.17/9,159.21
  6. Step 6: Final answer
    x = 7,148.85

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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.