Home / 18,720.17-28,080.30-4,869.17

Finding the Fourth Proportional to 18,720.17, 28,080.30 and 4,869.17

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Solution

The fourth proportional to 18,720.17, 28,080.30 and 4,869.17 is: 7,303.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.17 : 28,080.30 = 4,869.17 : x
  2. Step 2: Convert to fraction form
    18,720.17/28,080.30 = 4,869.17/x
  3. Step 3: Cross multiply
    18,720.17x = 28,080.30 × 4,869.17
  4. Step 4: Simplify right side
    18,720.17x = 136,727,754.35
  5. Step 5: Solve for x
    x = 136,727,754.35/18,720.17
  6. Step 6: Final answer
    x = 7,303.77

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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.