Home / 20,656.81-28,506.57-11,225.38

Finding the Fourth Proportional to 20,656.81, 28,506.57 and 11,225.38

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Solution

The fourth proportional to 20,656.81, 28,506.57 and 11,225.38 is: 15,491.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.81 : 28,506.57 = 11,225.38 : x
  2. Step 2: Convert to fraction form
    20,656.81/28,506.57 = 11,225.38/x
  3. Step 3: Cross multiply
    20,656.81x = 28,506.57 × 11,225.38
  4. Step 4: Simplify right side
    20,656.81x = 319,996,938.21
  5. Step 5: Solve for x
    x = 319,996,938.21/20,656.81
  6. Step 6: Final answer
    x = 15,491.11

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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.