Home / 20,339.95-28,054.66-18,666.76

Finding the Fourth Proportional to 20,339.95, 28,054.66 and 18,666.76

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Solution

The fourth proportional to 20,339.95, 28,054.66 and 18,666.76 is: 25,746.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,339.95 : 28,054.66 = 18,666.76 : x
  2. Step 2: Convert to fraction form
    20,339.95/28,054.66 = 18,666.76/x
  3. Step 3: Cross multiply
    20,339.95x = 28,054.66 × 18,666.76
  4. Step 4: Simplify right side
    20,339.95x = 523,689,605.10
  5. Step 5: Solve for x
    x = 523,689,605.10/20,339.95
  6. Step 6: Final answer
    x = 25,746.85

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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.