Home / 20,429.18-30,643.80-6,389.28

Finding the Fourth Proportional to 20,429.18, 30,643.80 and 6,389.28

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Solution

The fourth proportional to 20,429.18, 30,643.80 and 6,389.28 is: 9,583.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.18 : 30,643.80 = 6,389.28 : x
  2. Step 2: Convert to fraction form
    20,429.18/30,643.80 = 6,389.28/x
  3. Step 3: Cross multiply
    20,429.18x = 30,643.80 × 6,389.28
  4. Step 4: Simplify right side
    20,429.18x = 195,791,818.46
  5. Step 5: Solve for x
    x = 195,791,818.46/20,429.18
  6. Step 6: Final answer
    x = 9,583.93

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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.