Home / 15,399.65-21,254.82-9,730.80

Finding the Fourth Proportional to 15,399.65, 21,254.82 and 9,730.80

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Solution

The fourth proportional to 15,399.65, 21,254.82 and 9,730.80 is: 13,430.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.65 : 21,254.82 = 9,730.80 : x
  2. Step 2: Convert to fraction form
    15,399.65/21,254.82 = 9,730.80/x
  3. Step 3: Cross multiply
    15,399.65x = 21,254.82 × 9,730.80
  4. Step 4: Simplify right side
    15,399.65x = 206,826,402.46
  5. Step 5: Solve for x
    x = 206,826,402.46/15,399.65
  6. Step 6: Final answer
    x = 13,430.59

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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.