Home / 9,107.79-12,569.52-5,129.69

Finding the Fourth Proportional to 9,107.79, 12,569.52 and 5,129.69

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Solution

The fourth proportional to 9,107.79, 12,569.52 and 5,129.69 is: 7,079.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,107.79 : 12,569.52 = 5,129.69 : x
  2. Step 2: Convert to fraction form
    9,107.79/12,569.52 = 5,129.69/x
  3. Step 3: Cross multiply
    9,107.79x = 12,569.52 × 5,129.69
  4. Step 4: Simplify right side
    9,107.79x = 64,477,678.20
  5. Step 5: Solve for x
    x = 64,477,678.20/9,107.79
  6. Step 6: Final answer
    x = 7,079.40

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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.