Home / 21,569.76-29,754-13,180.32

Finding the Fourth Proportional to 21,569.76, 29,754 and 13,180.32

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Solution

The fourth proportional to 21,569.76, 29,754 and 13,180.32 is: 18,181.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,569.76 : 29,754 = 13,180.32 : x
  2. Step 2: Convert to fraction form
    21,569.76/29,754 = 13,180.32/x
  3. Step 3: Cross multiply
    21,569.76x = 29,754 × 13,180.32
  4. Step 4: Simplify right side
    21,569.76x = 392,167,241.28
  5. Step 5: Solve for x
    x = 392,167,241.28/21,569.76
  6. Step 6: Final answer
    x = 18,181.34

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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.