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Finding the Fourth Proportional to 13,012.53, 17,955.36 and 7,905.39

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Solution

The fourth proportional to 13,012.53, 17,955.36 and 7,905.39 is: 10,908.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,012.53 : 17,955.36 = 7,905.39 : x
  2. Step 2: Convert to fraction form
    13,012.53/17,955.36 = 7,905.39/x
  3. Step 3: Cross multiply
    13,012.53x = 17,955.36 × 7,905.39
  4. Step 4: Simplify right side
    13,012.53x = 141,944,123.39
  5. Step 5: Solve for x
    x = 141,944,123.39/13,012.53
  6. Step 6: Final answer
    x = 10,908.26

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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.