Home / 30,439.71-42,006.20-18,506.93

Finding the Fourth Proportional to 30,439.71, 42,006.20 and 18,506.93

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Solution

The fourth proportional to 30,439.71, 42,006.20 and 18,506.93 is: 25,539.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,439.71 : 42,006.20 = 18,506.93 : x
  2. Step 2: Convert to fraction form
    30,439.71/42,006.20 = 18,506.93/x
  3. Step 3: Cross multiply
    30,439.71x = 42,006.20 × 18,506.93
  4. Step 4: Simplify right side
    30,439.71x = 777,405,500.40
  5. Step 5: Solve for x
    x = 777,405,500.40/30,439.71
  6. Step 6: Final answer
    x = 25,539.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.