Home / 15,447.36-21,315.78-9,479.28

Finding the Fourth Proportional to 15,447.36, 21,315.78 and 9,479.28

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Solution

The fourth proportional to 15,447.36, 21,315.78 and 9,479.28 is: 13,080.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,447.36 : 21,315.78 = 9,479.28 : x
  2. Step 2: Convert to fraction form
    15,447.36/21,315.78 = 9,479.28/x
  3. Step 3: Cross multiply
    15,447.36x = 21,315.78 × 9,479.28
  4. Step 4: Simplify right side
    15,447.36x = 202,058,247.04
  5. Step 5: Solve for x
    x = 202,058,247.04/15,447.36
  6. Step 6: Final answer
    x = 13,080.44

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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.