Home / 20,206.55-27,875.38-15,699.45

Finding the Fourth Proportional to 20,206.55, 27,875.38 and 15,699.45

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Solution

The fourth proportional to 20,206.55, 27,875.38 and 15,699.45 is: 21,657.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,206.55 : 27,875.38 = 15,699.45 : x
  2. Step 2: Convert to fraction form
    20,206.55/27,875.38 = 15,699.45/x
  3. Step 3: Cross multiply
    20,206.55x = 27,875.38 × 15,699.45
  4. Step 4: Simplify right side
    20,206.55x = 437,628,134.54
  5. Step 5: Solve for x
    x = 437,628,134.54/20,206.55
  6. Step 6: Final answer
    x = 21,657.74

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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.