Home / 15,528.36-21,429.33-8,454.78

Finding the Fourth Proportional to 15,528.36, 21,429.33 and 8,454.78

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Solution

The fourth proportional to 15,528.36, 21,429.33 and 8,454.78 is: 11,667.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.36 : 21,429.33 = 8,454.78 : x
  2. Step 2: Convert to fraction form
    15,528.36/21,429.33 = 8,454.78/x
  3. Step 3: Cross multiply
    15,528.36x = 21,429.33 × 8,454.78
  4. Step 4: Simplify right side
    15,528.36x = 181,180,270.70
  5. Step 5: Solve for x
    x = 181,180,270.70/15,528.36
  6. Step 6: Final answer
    x = 11,667.70

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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.