Home / 21,275.36-29,340.88-13,318.32

Finding the Fourth Proportional to 21,275.36, 29,340.88 and 13,318.32

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Solution

The fourth proportional to 21,275.36, 29,340.88 and 13,318.32 is: 18,367.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.36 : 29,340.88 = 13,318.32 : x
  2. Step 2: Convert to fraction form
    21,275.36/29,340.88 = 13,318.32/x
  3. Step 3: Cross multiply
    21,275.36x = 29,340.88 × 13,318.32
  4. Step 4: Simplify right side
    21,275.36x = 390,771,228.92
  5. Step 5: Solve for x
    x = 390,771,228.92/21,275.36
  6. Step 6: Final answer
    x = 18,367.31

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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.