Home / 18,637.19-25,719.39-10,139.31

Finding the Fourth Proportional to 18,637.19, 25,719.39 and 10,139.31

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Solution

The fourth proportional to 18,637.19, 25,719.39 and 10,139.31 is: 13,992.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,637.19 : 25,719.39 = 10,139.31 : x
  2. Step 2: Convert to fraction form
    18,637.19/25,719.39 = 10,139.31/x
  3. Step 3: Cross multiply
    18,637.19x = 25,719.39 × 10,139.31
  4. Step 4: Simplify right side
    18,637.19x = 260,776,969.60
  5. Step 5: Solve for x
    x = 260,776,969.60/18,637.19
  6. Step 6: Final answer
    x = 13,992.29

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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.