Home / 15,390.16-21,238.44-8,316.60

Finding the Fourth Proportional to 15,390.16, 21,238.44 and 8,316.60

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Solution

The fourth proportional to 15,390.16, 21,238.44 and 8,316.60 is: 11,476.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.16 : 21,238.44 = 8,316.60 : x
  2. Step 2: Convert to fraction form
    15,390.16/21,238.44 = 8,316.60/x
  3. Step 3: Cross multiply
    15,390.16x = 21,238.44 × 8,316.60
  4. Step 4: Simplify right side
    15,390.16x = 176,631,610.10
  5. Step 5: Solve for x
    x = 176,631,610.10/15,390.16
  6. Step 6: Final answer
    x = 11,476.92

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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.