Home / 20,886.42-31,307.76-9,783.75

Finding the Fourth Proportional to 20,886.42, 31,307.76 and 9,783.75

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Solution

The fourth proportional to 20,886.42, 31,307.76 and 9,783.75 is: 14,665.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.42 : 31,307.76 = 9,783.75 : x
  2. Step 2: Convert to fraction form
    20,886.42/31,307.76 = 9,783.75/x
  3. Step 3: Cross multiply
    20,886.42x = 31,307.76 × 9,783.75
  4. Step 4: Simplify right side
    20,886.42x = 306,307,296.90
  5. Step 5: Solve for x
    x = 306,307,296.90/20,886.42
  6. Step 6: Final answer
    x = 14,665.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.