Home / 20,436.81-30,666.85-7,955.21

Finding the Fourth Proportional to 20,436.81, 30,666.85 and 7,955.21

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Solution

The fourth proportional to 20,436.81, 30,666.85 and 7,955.21 is: 11,937.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,436.81 : 30,666.85 = 7,955.21 : x
  2. Step 2: Convert to fraction form
    20,436.81/30,666.85 = 7,955.21/x
  3. Step 3: Cross multiply
    20,436.81x = 30,666.85 × 7,955.21
  4. Step 4: Simplify right side
    20,436.81x = 243,961,333.32
  5. Step 5: Solve for x
    x = 243,961,333.32/20,436.81
  6. Step 6: Final answer
    x = 11,937.35

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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.