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Finding the Fourth Proportional to 15,374.80, 23,069.40 and 7,987.60

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Solution

The fourth proportional to 15,374.80, 23,069.40 and 7,987.60 is: 11,985.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,374.80 : 23,069.40 = 7,987.60 : x
  2. Step 2: Convert to fraction form
    15,374.80/23,069.40 = 7,987.60/x
  3. Step 3: Cross multiply
    15,374.80x = 23,069.40 × 7,987.60
  4. Step 4: Simplify right side
    15,374.80x = 184,269,139.44
  5. Step 5: Solve for x
    x = 184,269,139.44/15,374.80
  6. Step 6: Final answer
    x = 11,985.14

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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.