Home / 15,520.32-21,418.47-8,806.23

Finding the Fourth Proportional to 15,520.32, 21,418.47 and 8,806.23

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Solution

The fourth proportional to 15,520.32, 21,418.47 and 8,806.23 is: 12,152.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.32 : 21,418.47 = 8,806.23 : x
  2. Step 2: Convert to fraction form
    15,520.32/21,418.47 = 8,806.23/x
  3. Step 3: Cross multiply
    15,520.32x = 21,418.47 × 8,806.23
  4. Step 4: Simplify right side
    15,520.32x = 188,615,973.07
  5. Step 5: Solve for x
    x = 188,615,973.07/15,520.32
  6. Step 6: Final answer
    x = 12,152.84

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Double scale
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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.