Home / 18,721.04-28,081.48-4,870

Finding the Fourth Proportional to 18,721.04, 28,081.48 and 4,870

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Solution

The fourth proportional to 18,721.04, 28,081.48 and 4,870 is: 7,304.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.04 : 28,081.48 = 4,870 : x
  2. Step 2: Convert to fraction form
    18,721.04/28,081.48 = 4,870/x
  3. Step 3: Cross multiply
    18,721.04x = 28,081.48 × 4,870
  4. Step 4: Simplify right side
    18,721.04x = 136,756,807.60
  5. Step 5: Solve for x
    x = 136,756,807.60/18,721.04
  6. Step 6: Final answer
    x = 7,304.98

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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.