Home / 13,679.31-18,875.61-7,710.51

Finding the Fourth Proportional to 13,679.31, 18,875.61 and 7,710.51

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Solution

The fourth proportional to 13,679.31, 18,875.61 and 7,710.51 is: 10,639.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.31 : 18,875.61 = 7,710.51 : x
  2. Step 2: Convert to fraction form
    13,679.31/18,875.61 = 7,710.51/x
  3. Step 3: Cross multiply
    13,679.31x = 18,875.61 × 7,710.51
  4. Step 4: Simplify right side
    13,679.31x = 145,540,579.66
  5. Step 5: Solve for x
    x = 145,540,579.66/13,679.31
  6. Step 6: Final answer
    x = 10,639.47

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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.