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Finding the Fourth Proportional to 28,810.72, 39,748.08 and 19,364.32

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Solution

The fourth proportional to 28,810.72, 39,748.08 and 19,364.32 is: 26,715.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,810.72 : 39,748.08 = 19,364.32 : x
  2. Step 2: Convert to fraction form
    28,810.72/39,748.08 = 19,364.32/x
  3. Step 3: Cross multiply
    28,810.72x = 39,748.08 × 19,364.32
  4. Step 4: Simplify right side
    28,810.72x = 769,694,540.51
  5. Step 5: Solve for x
    x = 769,694,540.51/28,810.72
  6. Step 6: Final answer
    x = 26,715.56

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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.