Home / 13,665.79-18,848.31-10,309.15

Finding the Fourth Proportional to 13,665.79, 18,848.31 and 10,309.15

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Solution

The fourth proportional to 13,665.79, 18,848.31 and 10,309.15 is: 14,218.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,665.79 : 18,848.31 = 10,309.15 : x
  2. Step 2: Convert to fraction form
    13,665.79/18,848.31 = 10,309.15/x
  3. Step 3: Cross multiply
    13,665.79x = 18,848.31 × 10,309.15
  4. Step 4: Simplify right side
    13,665.79x = 194,310,055.04
  5. Step 5: Solve for x
    x = 194,310,055.04/13,665.79
  6. Step 6: Final answer
    x = 14,218.72

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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.