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Finding the Fourth Proportional to 14,779.90, 20,396.42 and 8,065.45

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Solution

The fourth proportional to 14,779.90, 20,396.42 and 8,065.45 is: 11,130.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,779.90 : 20,396.42 = 8,065.45 : x
  2. Step 2: Convert to fraction form
    14,779.90/20,396.42 = 8,065.45/x
  3. Step 3: Cross multiply
    14,779.90x = 20,396.42 × 8,065.45
  4. Step 4: Simplify right side
    14,779.90x = 164,506,305.69
  5. Step 5: Solve for x
    x = 164,506,305.69/14,779.90
  6. Step 6: Final answer
    x = 11,130.41

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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.