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Finding the Fourth Proportional to 19,207.40, 28,811.10 and 5,167.40

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Solution

The fourth proportional to 19,207.40, 28,811.10 and 5,167.40 is: 7,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,207.40 : 28,811.10 = 5,167.40 : x
  2. Step 2: Convert to fraction form
    19,207.40/28,811.10 = 5,167.40/x
  3. Step 3: Cross multiply
    19,207.40x = 28,811.10 × 5,167.40
  4. Step 4: Simplify right side
    19,207.40x = 148,878,478.14
  5. Step 5: Solve for x
    x = 148,878,478.14/19,207.40
  6. Step 6: Final answer
    x = 7,751.10

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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.