Home / 9,129.43-12,599.81-5,151.52

Finding the Fourth Proportional to 9,129.43, 12,599.81 and 5,151.52

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Solution

The fourth proportional to 9,129.43, 12,599.81 and 5,151.52 is: 7,109.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129.43 : 12,599.81 = 5,151.52 : x
  2. Step 2: Convert to fraction form
    9,129.43/12,599.81 = 5,151.52/x
  3. Step 3: Cross multiply
    9,129.43x = 12,599.81 × 5,151.52
  4. Step 4: Simplify right side
    9,129.43x = 64,908,173.21
  5. Step 5: Solve for x
    x = 64,908,173.21/9,129.43
  6. Step 6: Final answer
    x = 7,109.77

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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.