Home / 21,393.19-29,508.69-13,428.46

Finding the Fourth Proportional to 21,393.19, 29,508.69 and 13,428.46

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Solution

The fourth proportional to 21,393.19, 29,508.69 and 13,428.46 is: 18,522.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,393.19 : 29,508.69 = 13,428.46 : x
  2. Step 2: Convert to fraction form
    21,393.19/29,508.69 = 13,428.46/x
  3. Step 3: Cross multiply
    21,393.19x = 29,508.69 × 13,428.46
  4. Step 4: Simplify right side
    21,393.19x = 396,256,263.32
  5. Step 5: Solve for x
    x = 396,256,263.32/21,393.19
  6. Step 6: Final answer
    x = 18,522.54

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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.