Home / 28,103.20-42,155.52-13,308.64

Finding the Fourth Proportional to 28,103.20, 42,155.52 and 13,308.64

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Solution

The fourth proportional to 28,103.20, 42,155.52 and 13,308.64 is: 19,963.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,103.20 : 42,155.52 = 13,308.64 : x
  2. Step 2: Convert to fraction form
    28,103.20/42,155.52 = 13,308.64/x
  3. Step 3: Cross multiply
    28,103.20x = 42,155.52 × 13,308.64
  4. Step 4: Simplify right side
    28,103.20x = 561,032,639.69
  5. Step 5: Solve for x
    x = 561,032,639.69/28,103.20
  6. Step 6: Final answer
    x = 19,963.30

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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.