Home / 19,811.79-29,764.13-18,690.93

Finding the Fourth Proportional to 19,811.79, 29,764.13 and 18,690.93

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Solution

The fourth proportional to 19,811.79, 29,764.13 and 18,690.93 is: 28,080.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.79 : 29,764.13 = 18,690.93 : x
  2. Step 2: Convert to fraction form
    19,811.79/29,764.13 = 18,690.93/x
  3. Step 3: Cross multiply
    19,811.79x = 29,764.13 × 18,690.93
  4. Step 4: Simplify right side
    19,811.79x = 556,319,176.89
  5. Step 5: Solve for x
    x = 556,319,176.89/19,811.79
  6. Step 6: Final answer
    x = 28,080.21

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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.