Home / 19,931.20-29,896.80-8,826.10

Finding the Fourth Proportional to 19,931.20, 29,896.80 and 8,826.10

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Solution

The fourth proportional to 19,931.20, 29,896.80 and 8,826.10 is: 13,239.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.20 : 29,896.80 = 8,826.10 : x
  2. Step 2: Convert to fraction form
    19,931.20/29,896.80 = 8,826.10/x
  3. Step 3: Cross multiply
    19,931.20x = 29,896.80 × 8,826.10
  4. Step 4: Simplify right side
    19,931.20x = 263,872,146.48
  5. Step 5: Solve for x
    x = 263,872,146.48/19,931.20
  6. Step 6: Final answer
    x = 13,239.15

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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.