Home / 30,479.10-42,079.32-19,158.18

Finding the Fourth Proportional to 30,479.10, 42,079.32 and 19,158.18

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Solution

The fourth proportional to 30,479.10, 42,079.32 and 19,158.18 is: 26,449.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,479.10 : 42,079.32 = 19,158.18 : x
  2. Step 2: Convert to fraction form
    30,479.10/42,079.32 = 19,158.18/x
  3. Step 3: Cross multiply
    30,479.10x = 42,079.32 × 19,158.18
  4. Step 4: Simplify right side
    30,479.10x = 806,163,186.84
  5. Step 5: Solve for x
    x = 806,163,186.84/30,479.10
  6. Step 6: Final answer
    x = 26,449.70

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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.