Home / 13,171.28-19,587.51-12,756.02

Finding the Fourth Proportional to 13,171.28, 19,587.51 and 12,756.02

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Solution

The fourth proportional to 13,171.28, 19,587.51 and 12,756.02 is: 18,969.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,171.28 : 19,587.51 = 12,756.02 : x
  2. Step 2: Convert to fraction form
    13,171.28/19,587.51 = 12,756.02/x
  3. Step 3: Cross multiply
    13,171.28x = 19,587.51 × 12,756.02
  4. Step 4: Simplify right side
    13,171.28x = 249,858,571.37
  5. Step 5: Solve for x
    x = 249,858,571.37/13,171.28
  6. Step 6: Final answer
    x = 18,969.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.