Home / 30,671.16-42,330.12-18,731.96

Finding the Fourth Proportional to 30,671.16, 42,330.12 and 18,731.96

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Solution

The fourth proportional to 30,671.16, 42,330.12 and 18,731.96 is: 25,852.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,671.16 : 42,330.12 = 18,731.96 : x
  2. Step 2: Convert to fraction form
    30,671.16/42,330.12 = 18,731.96/x
  3. Step 3: Cross multiply
    30,671.16x = 42,330.12 × 18,731.96
  4. Step 4: Simplify right side
    30,671.16x = 792,926,114.64
  5. Step 5: Solve for x
    x = 792,926,114.64/30,671.16
  6. Step 6: Final answer
    x = 25,852.50

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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.