Home / 27,720.15-38,256.08-15,787.23

Finding the Fourth Proportional to 27,720.15, 38,256.08 and 15,787.23

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Solution

The fourth proportional to 27,720.15, 38,256.08 and 15,787.23 is: 21,787.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.15 : 38,256.08 = 15,787.23 : x
  2. Step 2: Convert to fraction form
    27,720.15/38,256.08 = 15,787.23/x
  3. Step 3: Cross multiply
    27,720.15x = 38,256.08 × 15,787.23
  4. Step 4: Simplify right side
    27,720.15x = 603,957,454.92
  5. Step 5: Solve for x
    x = 603,957,454.92/27,720.15
  6. Step 6: Final answer
    x = 21,787.67

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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.