Home / 20,538.72-28,341.36-12,152.16

Finding the Fourth Proportional to 20,538.72, 28,341.36 and 12,152.16

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Solution

The fourth proportional to 20,538.72, 28,341.36 and 12,152.16 is: 16,768.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.72 : 28,341.36 = 12,152.16 : x
  2. Step 2: Convert to fraction form
    20,538.72/28,341.36 = 12,152.16/x
  3. Step 3: Cross multiply
    20,538.72x = 28,341.36 × 12,152.16
  4. Step 4: Simplify right side
    20,538.72x = 344,408,741.34
  5. Step 5: Solve for x
    x = 344,408,741.34/20,538.72
  6. Step 6: Final answer
    x = 16,768.75

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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.