Home / 21,328.80-32,007.60-13,915.20

Finding the Fourth Proportional to 21,328.80, 32,007.60 and 13,915.20

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Solution

The fourth proportional to 21,328.80, 32,007.60 and 13,915.20 is: 20,882.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.80 : 32,007.60 = 13,915.20 : x
  2. Step 2: Convert to fraction form
    21,328.80/32,007.60 = 13,915.20/x
  3. Step 3: Cross multiply
    21,328.80x = 32,007.60 × 13,915.20
  4. Step 4: Simplify right side
    21,328.80x = 445,392,155.52
  5. Step 5: Solve for x
    x = 445,392,155.52/21,328.80
  6. Step 6: Final answer
    x = 20,882.19

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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.