Home / 28,316.62-42,382.51-20,818.19

Finding the Fourth Proportional to 28,316.62, 42,382.51 and 20,818.19

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Solution

The fourth proportional to 28,316.62, 42,382.51 and 20,818.19 is: 31,159.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,316.62 : 42,382.51 = 20,818.19 : x
  2. Step 2: Convert to fraction form
    28,316.62/42,382.51 = 20,818.19/x
  3. Step 3: Cross multiply
    28,316.62x = 42,382.51 × 20,818.19
  4. Step 4: Simplify right side
    28,316.62x = 882,327,041.77
  5. Step 5: Solve for x
    x = 882,327,041.77/28,316.62
  6. Step 6: Final answer
    x = 31,159.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.