Home / 15,780.42-23,670.90-13,178.16

Finding the Fourth Proportional to 15,780.42, 23,670.90 and 13,178.16

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Solution

The fourth proportional to 15,780.42, 23,670.90 and 13,178.16 is: 19,767.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.42 : 23,670.90 = 13,178.16 : x
  2. Step 2: Convert to fraction form
    15,780.42/23,670.90 = 13,178.16/x
  3. Step 3: Cross multiply
    15,780.42x = 23,670.90 × 13,178.16
  4. Step 4: Simplify right side
    15,780.42x = 311,938,907.54
  5. Step 5: Solve for x
    x = 311,938,907.54/15,780.42
  6. Step 6: Final answer
    x = 19,767.47

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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.