Home / 21,787.36-30,062.28-13,399.12

Finding the Fourth Proportional to 21,787.36, 30,062.28 and 13,399.12

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Solution

The fourth proportional to 21,787.36, 30,062.28 and 13,399.12 is: 18,488.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.36 : 30,062.28 = 13,399.12 : x
  2. Step 2: Convert to fraction form
    21,787.36/30,062.28 = 13,399.12/x
  3. Step 3: Cross multiply
    21,787.36x = 30,062.28 × 13,399.12
  4. Step 4: Simplify right side
    21,787.36x = 402,808,097.19
  5. Step 5: Solve for x
    x = 402,808,097.19/21,787.36
  6. Step 6: Final answer
    x = 18,488.16

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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.