Home / 15,529.28-21,430.74-8,455.70

Finding the Fourth Proportional to 15,529.28, 21,430.74 and 8,455.70

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Solution

The fourth proportional to 15,529.28, 21,430.74 and 8,455.70 is: 11,669.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.28 : 21,430.74 = 8,455.70 : x
  2. Step 2: Convert to fraction form
    15,529.28/21,430.74 = 8,455.70/x
  3. Step 3: Cross multiply
    15,529.28x = 21,430.74 × 8,455.70
  4. Step 4: Simplify right side
    15,529.28x = 181,211,801.06
  5. Step 5: Solve for x
    x = 181,211,801.06/15,529.28
  6. Step 6: Final answer
    x = 11,669.04

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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.