Home / 13,970.68-20,952.78-5,209.72

Finding the Fourth Proportional to 13,970.68, 20,952.78 and 5,209.72

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Solution

The fourth proportional to 13,970.68, 20,952.78 and 5,209.72 is: 7,813.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,970.68 : 20,952.78 = 5,209.72 : x
  2. Step 2: Convert to fraction form
    13,970.68/20,952.78 = 5,209.72/x
  3. Step 3: Cross multiply
    13,970.68x = 20,952.78 × 5,209.72
  4. Step 4: Simplify right side
    13,970.68x = 109,158,117.02
  5. Step 5: Solve for x
    x = 109,158,117.02/13,970.68
  6. Step 6: Final answer
    x = 7,813.37

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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.