Home / 20,888.69-31,343.81-13,873.55

Finding the Fourth Proportional to 20,888.69, 31,343.81 and 13,873.55

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Solution

The fourth proportional to 20,888.69, 31,343.81 and 13,873.55 is: 20,817.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.69 : 31,343.81 = 13,873.55 : x
  2. Step 2: Convert to fraction form
    20,888.69/31,343.81 = 13,873.55/x
  3. Step 3: Cross multiply
    20,888.69x = 31,343.81 × 13,873.55
  4. Step 4: Simplify right side
    20,888.69x = 434,849,689.14
  5. Step 5: Solve for x
    x = 434,849,689.14/20,888.69
  6. Step 6: Final answer
    x = 20,817.48

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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.