Home / 13,098.15-18,074.90-7,129.70

Finding the Fourth Proportional to 13,098.15, 18,074.90 and 7,129.70

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Solution

The fourth proportional to 13,098.15, 18,074.90 and 7,129.70 is: 9,838.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,098.15 : 18,074.90 = 7,129.70 : x
  2. Step 2: Convert to fraction form
    13,098.15/18,074.90 = 7,129.70/x
  3. Step 3: Cross multiply
    13,098.15x = 18,074.90 × 7,129.70
  4. Step 4: Simplify right side
    13,098.15x = 128,868,488.51
  5. Step 5: Solve for x
    x = 128,868,488.51/13,098.15
  6. Step 6: Final answer
    x = 9,838.68

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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.