Home / 15,890.03-21,928.83-8,720.17

Finding the Fourth Proportional to 15,890.03, 21,928.83 and 8,720.17

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Solution

The fourth proportional to 15,890.03, 21,928.83 and 8,720.17 is: 12,034.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,890.03 : 21,928.83 = 8,720.17 : x
  2. Step 2: Convert to fraction form
    15,890.03/21,928.83 = 8,720.17/x
  3. Step 3: Cross multiply
    15,890.03x = 21,928.83 × 8,720.17
  4. Step 4: Simplify right side
    15,890.03x = 191,223,166.69
  5. Step 5: Solve for x
    x = 191,223,166.69/15,890.03
  6. Step 6: Final answer
    x = 12,034.16

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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.