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Finding the Fourth Proportional to 13,051.47, 18,010.74 and 7,385.46

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Solution

The fourth proportional to 13,051.47, 18,010.74 and 7,385.46 is: 10,191.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,051.47 : 18,010.74 = 7,385.46 : x
  2. Step 2: Convert to fraction form
    13,051.47/18,010.74 = 7,385.46/x
  3. Step 3: Cross multiply
    13,051.47x = 18,010.74 × 7,385.46
  4. Step 4: Simplify right side
    13,051.47x = 133,017,599.84
  5. Step 5: Solve for x
    x = 133,017,599.84/13,051.47
  6. Step 6: Final answer
    x = 10,191.77

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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.