Home / 15,390.64-21,239.00-8,317.04

Finding the Fourth Proportional to 15,390.64, 21,239.00 and 8,317.04

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Solution

The fourth proportional to 15,390.64, 21,239.00 and 8,317.04 is: 11,477.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.64 : 21,239.00 = 8,317.04 : x
  2. Step 2: Convert to fraction form
    15,390.64/21,239.00 = 8,317.04/x
  3. Step 3: Cross multiply
    15,390.64x = 21,239.00 × 8,317.04
  4. Step 4: Simplify right side
    15,390.64x = 176,645,570.97
  5. Step 5: Solve for x
    x = 176,645,570.97/15,390.64
  6. Step 6: Final answer
    x = 11,477.47

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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.