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Finding the Fourth Proportional to 15,390.34, 23,077.29 and 7,987.34

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Solution

The fourth proportional to 15,390.34, 23,077.29 and 7,987.34 is: 11,976.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.34 : 23,077.29 = 7,987.34 : x
  2. Step 2: Convert to fraction form
    15,390.34/23,077.29 = 7,987.34/x
  3. Step 3: Cross multiply
    15,390.34x = 23,077.29 × 7,987.34
  4. Step 4: Simplify right side
    15,390.34x = 184,326,161.51
  5. Step 5: Solve for x
    x = 184,326,161.51/15,390.34
  6. Step 6: Final answer
    x = 11,976.74

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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.