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Finding the Fourth Proportional to 28,698.66, 43,047.93 and 7,638.71

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Solution

The fourth proportional to 28,698.66, 43,047.93 and 7,638.71 is: 11,458.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,698.66 : 43,047.93 = 7,638.71 : x
  2. Step 2: Convert to fraction form
    28,698.66/43,047.93 = 7,638.71/x
  3. Step 3: Cross multiply
    28,698.66x = 43,047.93 × 7,638.71
  4. Step 4: Simplify right side
    28,698.66x = 328,830,438.13
  5. Step 5: Solve for x
    x = 328,830,438.13/28,698.66
  6. Step 6: Final answer
    x = 11,458.04

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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.