Home / 30,479.16-42,079.32-19,158.24

Finding the Fourth Proportional to 30,479.16, 42,079.32 and 19,158.24

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Solution

The fourth proportional to 30,479.16, 42,079.32 and 19,158.24 is: 26,449.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,479.16 : 42,079.32 = 19,158.24 : x
  2. Step 2: Convert to fraction form
    30,479.16/42,079.32 = 19,158.24/x
  3. Step 3: Cross multiply
    30,479.16x = 42,079.32 × 19,158.24
  4. Step 4: Simplify right side
    30,479.16x = 806,165,711.60
  5. Step 5: Solve for x
    x = 806,165,711.60/30,479.16
  6. Step 6: Final answer
    x = 26,449.74

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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.