Home / 30,877.23-42,611.36-18,947.15

Finding the Fourth Proportional to 30,877.23, 42,611.36 and 18,947.15

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Solution

The fourth proportional to 30,877.23, 42,611.36 and 18,947.15 is: 26,147.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,877.23 : 42,611.36 = 18,947.15 : x
  2. Step 2: Convert to fraction form
    30,877.23/42,611.36 = 18,947.15/x
  3. Step 3: Cross multiply
    30,877.23x = 42,611.36 × 18,947.15
  4. Step 4: Simplify right side
    30,877.23x = 807,363,521.83
  5. Step 5: Solve for x
    x = 807,363,521.83/30,877.23
  6. Step 6: Final answer
    x = 26,147.54

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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.