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Finding the Fourth Proportional to 28,438.84, 42,658.08 and 9,709.84

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Solution

The fourth proportional to 28,438.84, 42,658.08 and 9,709.84 is: 14,564.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.84 : 42,658.08 = 9,709.84 : x
  2. Step 2: Convert to fraction form
    28,438.84/42,658.08 = 9,709.84/x
  3. Step 3: Cross multiply
    28,438.84x = 42,658.08 × 9,709.84
  4. Step 4: Simplify right side
    28,438.84x = 414,203,131.51
  5. Step 5: Solve for x
    x = 414,203,131.51/28,438.84
  6. Step 6: Final answer
    x = 14,564.70

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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.