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Finding the Fourth Proportional to 28,826.04, 39,779.86 and 15,578.04

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Solution

The fourth proportional to 28,826.04, 39,779.86 and 15,578.04 is: 21,497.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,826.04 : 39,779.86 = 15,578.04 : x
  2. Step 2: Convert to fraction form
    28,826.04/39,779.86 = 15,578.04/x
  3. Step 3: Cross multiply
    28,826.04x = 39,779.86 × 15,578.04
  4. Step 4: Simplify right side
    28,826.04x = 619,692,250.27
  5. Step 5: Solve for x
    x = 619,692,250.27/28,826.04
  6. Step 6: Final answer
    x = 21,497.65

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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.