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Finding the Fourth Proportional to 18,779.51, 28,167.43 and 4,928.51

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Solution

The fourth proportional to 18,779.51, 28,167.43 and 4,928.51 is: 7,392.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.51 : 28,167.43 = 4,928.51 : x
  2. Step 2: Convert to fraction form
    18,779.51/28,167.43 = 4,928.51/x
  3. Step 3: Cross multiply
    18,779.51x = 28,167.43 × 4,928.51
  4. Step 4: Simplify right side
    18,779.51x = 138,823,294.95
  5. Step 5: Solve for x
    x = 138,823,294.95/18,779.51
  6. Step 6: Final answer
    x = 7,392.28

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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.