Home / 20,331.20-30,336.58-18,111.40

Finding the Fourth Proportional to 20,331.20, 30,336.58 and 18,111.40

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Solution

The fourth proportional to 20,331.20, 30,336.58 and 18,111.40 is: 27,024.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.20 : 30,336.58 = 18,111.40 : x
  2. Step 2: Convert to fraction form
    20,331.20/30,336.58 = 18,111.40/x
  3. Step 3: Cross multiply
    20,331.20x = 30,336.58 × 18,111.40
  4. Step 4: Simplify right side
    20,331.20x = 549,437,779.93
  5. Step 5: Solve for x
    x = 549,437,779.93/20,331.20
  6. Step 6: Final answer
    x = 27,024.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.