Home / 20,342.49-28,073.69-11,389.45

Finding the Fourth Proportional to 20,342.49, 28,073.69 and 11,389.45

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Solution

The fourth proportional to 20,342.49, 28,073.69 and 11,389.45 is: 15,718.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.49 : 28,073.69 = 11,389.45 : x
  2. Step 2: Convert to fraction form
    20,342.49/28,073.69 = 11,389.45/x
  3. Step 3: Cross multiply
    20,342.49x = 28,073.69 × 11,389.45
  4. Step 4: Simplify right side
    20,342.49x = 319,743,888.57
  5. Step 5: Solve for x
    x = 319,743,888.57/20,342.49
  6. Step 6: Final answer
    x = 15,718.03

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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.