Home / 15,202.56-20,979.36-8,915.52

Finding the Fourth Proportional to 15,202.56, 20,979.36 and 8,915.52

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Solution

The fourth proportional to 15,202.56, 20,979.36 and 8,915.52 is: 12,303.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,202.56 : 20,979.36 = 8,915.52 : x
  2. Step 2: Convert to fraction form
    15,202.56/20,979.36 = 8,915.52/x
  3. Step 3: Cross multiply
    15,202.56x = 20,979.36 × 8,915.52
  4. Step 4: Simplify right side
    15,202.56x = 187,041,903.67
  5. Step 5: Solve for x
    x = 187,041,903.67/15,202.56
  6. Step 6: Final answer
    x = 12,303.32

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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.