Home / 21,319.33-29,430.27-15,644.05

Finding the Fourth Proportional to 21,319.33, 29,430.27 and 15,644.05

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Solution

The fourth proportional to 21,319.33, 29,430.27 and 15,644.05 is: 21,595.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.33 : 29,430.27 = 15,644.05 : x
  2. Step 2: Convert to fraction form
    21,319.33/29,430.27 = 15,644.05/x
  3. Step 3: Cross multiply
    21,319.33x = 29,430.27 × 15,644.05
  4. Step 4: Simplify right side
    21,319.33x = 460,408,615.39
  5. Step 5: Solve for x
    x = 460,408,615.39/21,319.33
  6. Step 6: Final answer
    x = 21,595.83

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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.