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Finding the Fourth Proportional to 14,192.78, 19,586.65 and 7,905.16

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Solution

The fourth proportional to 14,192.78, 19,586.65 and 7,905.16 is: 10,909.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,192.78 : 19,586.65 = 7,905.16 : x
  2. Step 2: Convert to fraction form
    14,192.78/19,586.65 = 7,905.16/x
  3. Step 3: Cross multiply
    14,192.78x = 19,586.65 × 7,905.16
  4. Step 4: Simplify right side
    14,192.78x = 154,835,602.11
  5. Step 5: Solve for x
    x = 154,835,602.11/14,192.78
  6. Step 6: Final answer
    x = 10,909.46

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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.