Home / 15,825.48-21,838.85-8,655.20

Finding the Fourth Proportional to 15,825.48, 21,838.85 and 8,655.20

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Solution

The fourth proportional to 15,825.48, 21,838.85 and 8,655.20 is: 11,944.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,825.48 : 21,838.85 = 8,655.20 : x
  2. Step 2: Convert to fraction form
    15,825.48/21,838.85 = 8,655.20/x
  3. Step 3: Cross multiply
    15,825.48x = 21,838.85 × 8,655.20
  4. Step 4: Simplify right side
    15,825.48x = 189,019,576.40
  5. Step 5: Solve for x
    x = 189,019,576.40/15,825.48
  6. Step 6: Final answer
    x = 11,944.01

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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.