Home / 20,720.65-28,594.23-11,289.22

Finding the Fourth Proportional to 20,720.65, 28,594.23 and 11,289.22

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Solution

The fourth proportional to 20,720.65, 28,594.23 and 11,289.22 is: 15,578.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.65 : 28,594.23 = 11,289.22 : x
  2. Step 2: Convert to fraction form
    20,720.65/28,594.23 = 11,289.22/x
  3. Step 3: Cross multiply
    20,720.65x = 28,594.23 × 11,289.22
  4. Step 4: Simplify right side
    20,720.65x = 322,806,553.20
  5. Step 5: Solve for x
    x = 322,806,553.20/20,720.65
  6. Step 6: Final answer
    x = 15,578.98

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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.