Home / 20,963.90-28,931.59-11,533.07

Finding the Fourth Proportional to 20,963.90, 28,931.59 and 11,533.07

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Solution

The fourth proportional to 20,963.90, 28,931.59 and 11,533.07 is: 15,916.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.90 : 28,931.59 = 11,533.07 : x
  2. Step 2: Convert to fraction form
    20,963.90/28,931.59 = 11,533.07/x
  3. Step 3: Cross multiply
    20,963.90x = 28,931.59 × 11,533.07
  4. Step 4: Simplify right side
    20,963.90x = 333,670,052.68
  5. Step 5: Solve for x
    x = 333,670,052.68/20,963.90
  6. Step 6: Final answer
    x = 15,916.41

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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.