Home / 10,085.60-15,130.98-7,129.91

Finding the Fourth Proportional to 10,085.60, 15,130.98 and 7,129.91

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Solution

The fourth proportional to 10,085.60, 15,130.98 and 7,129.91 is: 10,696.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,085.60 : 15,130.98 = 7,129.91 : x
  2. Step 2: Convert to fraction form
    10,085.60/15,130.98 = 7,129.91/x
  3. Step 3: Cross multiply
    10,085.60x = 15,130.98 × 7,129.91
  4. Step 4: Simplify right side
    10,085.60x = 107,882,525.61
  5. Step 5: Solve for x
    x = 107,882,525.61/10,085.60
  6. Step 6: Final answer
    x = 10,696.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.