Home / 21,265.34-29,327.06-13,308.30

Finding the Fourth Proportional to 21,265.34, 29,327.06 and 13,308.30

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Solution

The fourth proportional to 21,265.34, 29,327.06 and 13,308.30 is: 18,353.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.34 : 29,327.06 = 13,308.30 : x
  2. Step 2: Convert to fraction form
    21,265.34/29,327.06 = 13,308.30/x
  3. Step 3: Cross multiply
    21,265.34x = 29,327.06 × 13,308.30
  4. Step 4: Simplify right side
    21,265.34x = 390,293,345.87
  5. Step 5: Solve for x
    x = 390,293,345.87/21,265.34
  6. Step 6: Final answer
    x = 18,353.50

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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.