Home / 13,386.72-18,473.36-7,721.48

Finding the Fourth Proportional to 13,386.72, 18,473.36 and 7,721.48

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Solution

The fourth proportional to 13,386.72, 18,473.36 and 7,721.48 is: 10,655.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.72 : 18,473.36 = 7,721.48 : x
  2. Step 2: Convert to fraction form
    13,386.72/18,473.36 = 7,721.48/x
  3. Step 3: Cross multiply
    13,386.72x = 18,473.36 × 7,721.48
  4. Step 4: Simplify right side
    13,386.72x = 142,641,679.77
  5. Step 5: Solve for x
    x = 142,641,679.77/13,386.72
  6. Step 6: Final answer
    x = 10,655.46

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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.