Home / 20,711.59-30,867.55-20,678.65

Finding the Fourth Proportional to 20,711.59, 30,867.55 and 20,678.65

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Solution

The fourth proportional to 20,711.59, 30,867.55 and 20,678.65 is: 30,818.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.59 : 30,867.55 = 20,678.65 : x
  2. Step 2: Convert to fraction form
    20,711.59/30,867.55 = 20,678.65/x
  3. Step 3: Cross multiply
    20,711.59x = 30,867.55 × 20,678.65
  4. Step 4: Simplify right side
    20,711.59x = 638,299,262.81
  5. Step 5: Solve for x
    x = 638,299,262.81/20,711.59
  6. Step 6: Final answer
    x = 30,818.46

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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.