Home / 31,000.08-42,779.16-18,254.46

Finding the Fourth Proportional to 31,000.08, 42,779.16 and 18,254.46

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Solution

The fourth proportional to 31,000.08, 42,779.16 and 18,254.46 is: 25,190.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,000.08 : 42,779.16 = 18,254.46 : x
  2. Step 2: Convert to fraction form
    31,000.08/42,779.16 = 18,254.46/x
  3. Step 3: Cross multiply
    31,000.08x = 42,779.16 × 18,254.46
  4. Step 4: Simplify right side
    31,000.08x = 780,910,465.05
  5. Step 5: Solve for x
    x = 780,910,465.05/31,000.08
  6. Step 6: Final answer
    x = 25,190.60

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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.