Home / 13,719.49-18,921.75-10,688.68

Finding the Fourth Proportional to 13,719.49, 18,921.75 and 10,688.68

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Solution

The fourth proportional to 13,719.49, 18,921.75 and 10,688.68 is: 14,741.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.49 : 18,921.75 = 10,688.68 : x
  2. Step 2: Convert to fraction form
    13,719.49/18,921.75 = 10,688.68/x
  3. Step 3: Cross multiply
    13,719.49x = 18,921.75 × 10,688.68
  4. Step 4: Simplify right side
    13,719.49x = 202,248,530.79
  5. Step 5: Solve for x
    x = 202,248,530.79/13,719.49
  6. Step 6: Final answer
    x = 14,741.69

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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.