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Finding the Fourth Proportional to 20,807.88, 28,714.87 and 13,368.84

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Solution

The fourth proportional to 20,807.88, 28,714.87 and 13,368.84 is: 18,449.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.88 : 28,714.87 = 13,368.84 : x
  2. Step 2: Convert to fraction form
    20,807.88/28,714.87 = 13,368.84/x
  3. Step 3: Cross multiply
    20,807.88x = 28,714.87 × 13,368.84
  4. Step 4: Simplify right side
    20,807.88x = 383,884,502.65
  5. Step 5: Solve for x
    x = 383,884,502.65/20,807.88
  6. Step 6: Final answer
    x = 18,449.00

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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.