Home / 7,129.60-10,688.80-2,748.16

Finding the Fourth Proportional to 7,129.60, 10,688.80 and 2,748.16

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Solution

The fourth proportional to 7,129.60, 10,688.80 and 2,748.16 is: 4,120.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.60 : 10,688.80 = 2,748.16 : x
  2. Step 2: Convert to fraction form
    7,129.60/10,688.80 = 2,748.16/x
  3. Step 3: Cross multiply
    7,129.60x = 10,688.80 × 2,748.16
  4. Step 4: Simplify right side
    7,129.60x = 29,374,532.61
  5. Step 5: Solve for x
    x = 29,374,532.61/7,129.60
  6. Step 6: Final answer
    x = 4,120.08

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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.