Home / 28,493.16-39,320.34-15,747.20

Finding the Fourth Proportional to 28,493.16, 39,320.34 and 15,747.20

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Solution

The fourth proportional to 28,493.16, 39,320.34 and 15,747.20 is: 21,731.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,493.16 : 39,320.34 = 15,747.20 : x
  2. Step 2: Convert to fraction form
    28,493.16/39,320.34 = 15,747.20/x
  3. Step 3: Cross multiply
    28,493.16x = 39,320.34 × 15,747.20
  4. Step 4: Simplify right side
    28,493.16x = 619,185,258.05
  5. Step 5: Solve for x
    x = 619,185,258.05/28,493.16
  6. Step 6: Final answer
    x = 21,731.01

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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.