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Finding the Fourth Proportional to 19,314.98, 28,966.88 and 8,779.13

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Solution

The fourth proportional to 19,314.98, 28,966.88 and 8,779.13 is: 13,166.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,314.98 : 28,966.88 = 8,779.13 : x
  2. Step 2: Convert to fraction form
    19,314.98/28,966.88 = 8,779.13/x
  3. Step 3: Cross multiply
    19,314.98x = 28,966.88 × 8,779.13
  4. Step 4: Simplify right side
    19,314.98x = 254,304,005.21
  5. Step 5: Solve for x
    x = 254,304,005.21/19,314.98
  6. Step 6: Final answer
    x = 13,166.15

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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.