Home / 15,529.19-21,430.85-8,456.13

Finding the Fourth Proportional to 15,529.19, 21,430.85 and 8,456.13

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Solution

The fourth proportional to 15,529.19, 21,430.85 and 8,456.13 is: 11,669.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.19 : 21,430.85 = 8,456.13 : x
  2. Step 2: Convert to fraction form
    15,529.19/21,430.85 = 8,456.13/x
  3. Step 3: Cross multiply
    15,529.19x = 21,430.85 × 8,456.13
  4. Step 4: Simplify right side
    15,529.19x = 181,222,011.33
  5. Step 5: Solve for x
    x = 181,222,011.33/15,529.19
  6. Step 6: Final answer
    x = 11,669.77

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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.