Home / 15,536.64-21,428.24-10,991.28

Finding the Fourth Proportional to 15,536.64, 21,428.24 and 10,991.28

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Solution

The fourth proportional to 15,536.64, 21,428.24 and 10,991.28 is: 15,159.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,536.64 : 21,428.24 = 10,991.28 : x
  2. Step 2: Convert to fraction form
    15,536.64/21,428.24 = 10,991.28/x
  3. Step 3: Cross multiply
    15,536.64x = 21,428.24 × 10,991.28
  4. Step 4: Simplify right side
    15,536.64x = 235,523,785.75
  5. Step 5: Solve for x
    x = 235,523,785.75/15,536.64
  6. Step 6: Final answer
    x = 15,159.25

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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.