Home / 15,456.76-21,330.81-8,742.25

Finding the Fourth Proportional to 15,456.76, 21,330.81 and 8,742.25

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Solution

The fourth proportional to 15,456.76, 21,330.81 and 8,742.25 is: 12,064.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.76 : 21,330.81 = 8,742.25 : x
  2. Step 2: Convert to fraction form
    15,456.76/21,330.81 = 8,742.25/x
  3. Step 3: Cross multiply
    15,456.76x = 21,330.81 × 8,742.25
  4. Step 4: Simplify right side
    15,456.76x = 186,479,188.51
  5. Step 5: Solve for x
    x = 186,479,188.51/15,456.76
  6. Step 6: Final answer
    x = 12,064.58

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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.