Home / 15,417.68-21,255.20-9,749.60

Finding the Fourth Proportional to 15,417.68, 21,255.20 and 9,749.60

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Solution

The fourth proportional to 15,417.68, 21,255.20 and 9,749.60 is: 13,441.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,417.68 : 21,255.20 = 9,749.60 : x
  2. Step 2: Convert to fraction form
    15,417.68/21,255.20 = 9,749.60/x
  3. Step 3: Cross multiply
    15,417.68x = 21,255.20 × 9,749.60
  4. Step 4: Simplify right side
    15,417.68x = 207,229,697.92
  5. Step 5: Solve for x
    x = 207,229,697.92/15,417.68
  6. Step 6: Final answer
    x = 13,441.04

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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.