Home / 31,074.30-42,867.84-21,006.24

Finding the Fourth Proportional to 31,074.30, 42,867.84 and 21,006.24

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Solution

The fourth proportional to 31,074.30, 42,867.84 and 21,006.24 is: 28,978.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,074.30 : 42,867.84 = 21,006.24 : x
  2. Step 2: Convert to fraction form
    31,074.30/42,867.84 = 21,006.24/x
  3. Step 3: Cross multiply
    31,074.30x = 42,867.84 × 21,006.24
  4. Step 4: Simplify right side
    31,074.30x = 900,492,135.32
  5. Step 5: Solve for x
    x = 900,492,135.32/31,074.30
  6. Step 6: Final answer
    x = 28,978.68

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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.