Home / 10,929.60-15,074.86-7,146.70

Finding the Fourth Proportional to 10,929.60, 15,074.86 and 7,146.70

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Solution

The fourth proportional to 10,929.60, 15,074.86 and 7,146.70 is: 9,857.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,929.60 : 15,074.86 = 7,146.70 : x
  2. Step 2: Convert to fraction form
    10,929.60/15,074.86 = 7,146.70/x
  3. Step 3: Cross multiply
    10,929.60x = 15,074.86 × 7,146.70
  4. Step 4: Simplify right side
    10,929.60x = 107,735,459.81
  5. Step 5: Solve for x
    x = 107,735,459.81/10,929.60
  6. Step 6: Final answer
    x = 9,857.22

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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.