Home / 15,428.77-21,291.75-8,355.19

Finding the Fourth Proportional to 15,428.77, 21,291.75 and 8,355.19

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Solution

The fourth proportional to 15,428.77, 21,291.75 and 8,355.19 is: 11,530.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.77 : 21,291.75 = 8,355.19 : x
  2. Step 2: Convert to fraction form
    15,428.77/21,291.75 = 8,355.19/x
  3. Step 3: Cross multiply
    15,428.77x = 21,291.75 × 8,355.19
  4. Step 4: Simplify right side
    15,428.77x = 177,896,616.68
  5. Step 5: Solve for x
    x = 177,896,616.68/15,428.77
  6. Step 6: Final answer
    x = 11,530.19

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Half scale
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Double scale
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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.