Home / 15,438.88-21,307.60-8,724.80

Finding the Fourth Proportional to 15,438.88, 21,307.60 and 8,724.80

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Solution

The fourth proportional to 15,438.88, 21,307.60 and 8,724.80 is: 12,041.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.88 : 21,307.60 = 8,724.80 : x
  2. Step 2: Convert to fraction form
    15,438.88/21,307.60 = 8,724.80/x
  3. Step 3: Cross multiply
    15,438.88x = 21,307.60 × 8,724.80
  4. Step 4: Simplify right side
    15,438.88x = 185,904,548.48
  5. Step 5: Solve for x
    x = 185,904,548.48/15,438.88
  6. Step 6: Final answer
    x = 12,041.32

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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.