Home / 15,784.56-21,787.65-10,120.23

Finding the Fourth Proportional to 15,784.56, 21,787.65 and 10,120.23

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Solution

The fourth proportional to 15,784.56, 21,787.65 and 10,120.23 is: 13,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,784.56 : 21,787.65 = 10,120.23 : x
  2. Step 2: Convert to fraction form
    15,784.56/21,787.65 = 10,120.23/x
  3. Step 3: Cross multiply
    15,784.56x = 21,787.65 × 10,120.23
  4. Step 4: Simplify right side
    15,784.56x = 220,496,029.16
  5. Step 5: Solve for x
    x = 220,496,029.16/15,784.56
  6. Step 6: Final answer
    x = 13,969.10

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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.