Home / 9,166.40-12,648.88-5,390.08

Finding the Fourth Proportional to 9,166.40, 12,648.88 and 5,390.08

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Solution

The fourth proportional to 9,166.40, 12,648.88 and 5,390.08 is: 7,437.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,166.40 : 12,648.88 = 5,390.08 : x
  2. Step 2: Convert to fraction form
    9,166.40/12,648.88 = 5,390.08/x
  3. Step 3: Cross multiply
    9,166.40x = 12,648.88 × 5,390.08
  4. Step 4: Simplify right side
    9,166.40x = 68,178,475.11
  5. Step 5: Solve for x
    x = 68,178,475.11/9,166.40
  6. Step 6: Final answer
    x = 7,437.87

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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.