Home / 20,964.79-28,931.39-11,533.28

Finding the Fourth Proportional to 20,964.79, 28,931.39 and 11,533.28

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Solution

The fourth proportional to 20,964.79, 28,931.39 and 11,533.28 is: 15,915.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.79 : 28,931.39 = 11,533.28 : x
  2. Step 2: Convert to fraction form
    20,964.79/28,931.39 = 11,533.28/x
  3. Step 3: Cross multiply
    20,964.79x = 28,931.39 × 11,533.28
  4. Step 4: Simplify right side
    20,964.79x = 333,673,821.66
  5. Step 5: Solve for x
    x = 333,673,821.66/20,964.79
  6. Step 6: Final answer
    x = 15,915.92

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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.