Home / 28,363.02-39,140.58-15,787.78

Finding the Fourth Proportional to 28,363.02, 39,140.58 and 15,787.78

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Solution

The fourth proportional to 28,363.02, 39,140.58 and 15,787.78 is: 21,786.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363.02 : 39,140.58 = 15,787.78 : x
  2. Step 2: Convert to fraction form
    28,363.02/39,140.58 = 15,787.78/x
  3. Step 3: Cross multiply
    28,363.02x = 39,140.58 × 15,787.78
  4. Step 4: Simplify right side
    28,363.02x = 617,942,866.11
  5. Step 5: Solve for x
    x = 617,942,866.11/28,363.02
  6. Step 6: Final answer
    x = 21,786.92

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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.