Home / 20,533.28-28,335.60-11,580.80

Finding the Fourth Proportional to 20,533.28, 28,335.60 and 11,580.80

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Solution

The fourth proportional to 20,533.28, 28,335.60 and 11,580.80 is: 15,981.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,533.28 : 28,335.60 = 11,580.80 : x
  2. Step 2: Convert to fraction form
    20,533.28/28,335.60 = 11,580.80/x
  3. Step 3: Cross multiply
    20,533.28x = 28,335.60 × 11,580.80
  4. Step 4: Simplify right side
    20,533.28x = 328,148,916.48
  5. Step 5: Solve for x
    x = 328,148,916.48/20,533.28
  6. Step 6: Final answer
    x = 15,981.32

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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.