Home / 20,295.10-30,423.51-7,139.08

Finding the Fourth Proportional to 20,295.10, 30,423.51 and 7,139.08

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Solution

The fourth proportional to 20,295.10, 30,423.51 and 7,139.08 is: 10,701.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.10 : 30,423.51 = 7,139.08 : x
  2. Step 2: Convert to fraction form
    20,295.10/30,423.51 = 7,139.08/x
  3. Step 3: Cross multiply
    20,295.10x = 30,423.51 × 7,139.08
  4. Step 4: Simplify right side
    20,295.10x = 217,195,795.71
  5. Step 5: Solve for x
    x = 217,195,795.71/20,295.10
  6. Step 6: Final answer
    x = 10,701.88

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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.