Home / 20,916-28,864.08-11,484.72

Finding the Fourth Proportional to 20,916, 28,864.08 and 11,484.72

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Solution

The fourth proportional to 20,916, 28,864.08 and 11,484.72 is: 15,848.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916 : 28,864.08 = 11,484.72 : x
  2. Step 2: Convert to fraction form
    20,916/28,864.08 = 11,484.72/x
  3. Step 3: Cross multiply
    20,916x = 28,864.08 × 11,484.72
  4. Step 4: Simplify right side
    20,916x = 331,495,876.86
  5. Step 5: Solve for x
    x = 331,495,876.86/20,916
  6. Step 6: Final answer
    x = 15,848.91

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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.