Home / 28,107.20-42,161.52-13,312.64

Finding the Fourth Proportional to 28,107.20, 42,161.52 and 13,312.64

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Solution

The fourth proportional to 28,107.20, 42,161.52 and 13,312.64 is: 19,969.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.20 : 42,161.52 = 13,312.64 : x
  2. Step 2: Convert to fraction form
    28,107.20/42,161.52 = 13,312.64/x
  3. Step 3: Cross multiply
    28,107.20x = 42,161.52 × 13,312.64
  4. Step 4: Simplify right side
    28,107.20x = 561,281,137.61
  5. Step 5: Solve for x
    x = 561,281,137.61/28,107.20
  6. Step 6: Final answer
    x = 19,969.30

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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.