Home / 28,436.40-42,659.55-11,787.30

Finding the Fourth Proportional to 28,436.40, 42,659.55 and 11,787.30

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Solution

The fourth proportional to 28,436.40, 42,659.55 and 11,787.30 is: 17,683.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.40 : 42,659.55 = 11,787.30 : x
  2. Step 2: Convert to fraction form
    28,436.40/42,659.55 = 11,787.30/x
  3. Step 3: Cross multiply
    28,436.40x = 42,659.55 × 11,787.30
  4. Step 4: Simplify right side
    28,436.40x = 502,840,913.72
  5. Step 5: Solve for x
    x = 502,840,913.72/28,436.40
  6. Step 6: Final answer
    x = 17,683.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.