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Finding the Fourth Proportional to 9,779.80, 14,660.10 and 5,102.20

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Solution

The fourth proportional to 9,779.80, 14,660.10 and 5,102.20 is: 7,648.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,779.80 : 14,660.10 = 5,102.20 : x
  2. Step 2: Convert to fraction form
    9,779.80/14,660.10 = 5,102.20/x
  3. Step 3: Cross multiply
    9,779.80x = 14,660.10 × 5,102.20
  4. Step 4: Simplify right side
    9,779.80x = 74,798,762.22
  5. Step 5: Solve for x
    x = 74,798,762.22/9,779.80
  6. Step 6: Final answer
    x = 7,648.29

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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.