Home / 15,409.20-21,264.90-9,357.72

Finding the Fourth Proportional to 15,409.20, 21,264.90 and 9,357.72

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Solution

The fourth proportional to 15,409.20, 21,264.90 and 9,357.72 is: 12,913.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,409.20 : 21,264.90 = 9,357.72 : x
  2. Step 2: Convert to fraction form
    15,409.20/21,264.90 = 9,357.72/x
  3. Step 3: Cross multiply
    15,409.20x = 21,264.90 × 9,357.72
  4. Step 4: Simplify right side
    15,409.20x = 198,990,980.03
  5. Step 5: Solve for x
    x = 198,990,980.03/15,409.20
  6. Step 6: Final answer
    x = 12,913.78

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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.