Home / 13,289.40-19,921.30-10,326.20

Finding the Fourth Proportional to 13,289.40, 19,921.30 and 10,326.20

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Solution

The fourth proportional to 13,289.40, 19,921.30 and 10,326.20 is: 15,479.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.40 : 19,921.30 = 10,326.20 : x
  2. Step 2: Convert to fraction form
    13,289.40/19,921.30 = 10,326.20/x
  3. Step 3: Cross multiply
    13,289.40x = 19,921.30 × 10,326.20
  4. Step 4: Simplify right side
    13,289.40x = 205,711,328.06
  5. Step 5: Solve for x
    x = 205,711,328.06/13,289.40
  6. Step 6: Final answer
    x = 15,479.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.