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Finding the Fourth Proportional to 12,905.65, 17,812.47 and 7,601.77

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Solution

The fourth proportional to 12,905.65, 17,812.47 and 7,601.77 is: 10,492.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.65 : 17,812.47 = 7,601.77 : x
  2. Step 2: Convert to fraction form
    12,905.65/17,812.47 = 7,601.77/x
  3. Step 3: Cross multiply
    12,905.65x = 17,812.47 × 7,601.77
  4. Step 4: Simplify right side
    12,905.65x = 135,406,300.07
  5. Step 5: Solve for x
    x = 135,406,300.07/12,905.65
  6. Step 6: Final answer
    x = 10,492.02

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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.