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Finding the Fourth Proportional to 9,984.79, 13,779.12 and 5,508.71

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Solution

The fourth proportional to 9,984.79, 13,779.12 and 5,508.71 is: 7,602.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,984.79 : 13,779.12 = 5,508.71 : x
  2. Step 2: Convert to fraction form
    9,984.79/13,779.12 = 5,508.71/x
  3. Step 3: Cross multiply
    9,984.79x = 13,779.12 × 5,508.71
  4. Step 4: Simplify right side
    9,984.79x = 75,905,176.14
  5. Step 5: Solve for x
    x = 75,905,176.14/9,984.79
  6. Step 6: Final answer
    x = 7,602.08

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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.