Home / 15,529.52-21,430.78-8,455.79

Finding the Fourth Proportional to 15,529.52, 21,430.78 and 8,455.79

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Solution

The fourth proportional to 15,529.52, 21,430.78 and 8,455.79 is: 11,669.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.52 : 21,430.78 = 8,455.79 : x
  2. Step 2: Convert to fraction form
    15,529.52/21,430.78 = 8,455.79/x
  3. Step 3: Cross multiply
    15,529.52x = 21,430.78 × 8,455.79
  4. Step 4: Simplify right side
    15,529.52x = 181,214,207.65
  5. Step 5: Solve for x
    x = 181,214,207.65/15,529.52
  6. Step 6: Final answer
    x = 11,669.01

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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.