Home / 15,389.85-21,227.43-9,424.47

Finding the Fourth Proportional to 15,389.85, 21,227.43 and 9,424.47

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Solution

The fourth proportional to 15,389.85, 21,227.43 and 9,424.47 is: 12,999.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.85 : 21,227.43 = 9,424.47 : x
  2. Step 2: Convert to fraction form
    15,389.85/21,227.43 = 9,424.47/x
  3. Step 3: Cross multiply
    15,389.85x = 21,227.43 × 9,424.47
  4. Step 4: Simplify right side
    15,389.85x = 200,057,277.21
  5. Step 5: Solve for x
    x = 200,057,277.21/15,389.85
  6. Step 6: Final answer
    x = 12,999.30

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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.