Home / 28,155.10-38,853.70-15,408.22

Finding the Fourth Proportional to 28,155.10, 38,853.70 and 15,408.22

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Solution

The fourth proportional to 28,155.10, 38,853.70 and 15,408.22 is: 21,263.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.10 : 38,853.70 = 15,408.22 : x
  2. Step 2: Convert to fraction form
    28,155.10/38,853.70 = 15,408.22/x
  3. Step 3: Cross multiply
    28,155.10x = 38,853.70 × 15,408.22
  4. Step 4: Simplify right side
    28,155.10x = 598,666,357.41
  5. Step 5: Solve for x
    x = 598,666,357.41/28,155.10
  6. Step 6: Final answer
    x = 21,263.16

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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.