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Finding the Fourth Proportional to 28,608.04, 42,913.94 and 9,889.88

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Solution

The fourth proportional to 28,608.04, 42,913.94 and 9,889.88 is: 14,835.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,608.04 : 42,913.94 = 9,889.88 : x
  2. Step 2: Convert to fraction form
    28,608.04/42,913.94 = 9,889.88/x
  3. Step 3: Cross multiply
    28,608.04x = 42,913.94 × 9,889.88
  4. Step 4: Simplify right side
    28,608.04x = 424,413,777.74
  5. Step 5: Solve for x
    x = 424,413,777.74/28,608.04
  6. Step 6: Final answer
    x = 14,835.47

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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.