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Finding the Fourth Proportional to 15,433.84, 21,298.88 and 9,145

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Solution

The fourth proportional to 15,433.84, 21,298.88 and 9,145 is: 12,620.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,433.84 : 21,298.88 = 9,145 : x
  2. Step 2: Convert to fraction form
    15,433.84/21,298.88 = 9,145/x
  3. Step 3: Cross multiply
    15,433.84x = 21,298.88 × 9,145
  4. Step 4: Simplify right side
    15,433.84x = 194,778,257.60
  5. Step 5: Solve for x
    x = 194,778,257.60/15,433.84
  6. Step 6: Final answer
    x = 12,620.21

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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.