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Finding the Fourth Proportional to 18,920.79, 28,379.03 and 5,068.71

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Solution

The fourth proportional to 18,920.79, 28,379.03 and 5,068.71 is: 7,602.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.79 : 28,379.03 = 5,068.71 : x
  2. Step 2: Convert to fraction form
    18,920.79/28,379.03 = 5,068.71/x
  3. Step 3: Cross multiply
    18,920.79x = 28,379.03 × 5,068.71
  4. Step 4: Simplify right side
    18,920.79x = 143,845,047.81
  5. Step 5: Solve for x
    x = 143,845,047.81/18,920.79
  6. Step 6: Final answer
    x = 7,602.49

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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.