Home / 15,402.90-21,255.96-8,688.50

Finding the Fourth Proportional to 15,402.90, 21,255.96 and 8,688.50

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Solution

The fourth proportional to 15,402.90, 21,255.96 and 8,688.50 is: 11,990.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,402.90 : 21,255.96 = 8,688.50 : x
  2. Step 2: Convert to fraction form
    15,402.90/21,255.96 = 8,688.50/x
  3. Step 3: Cross multiply
    15,402.90x = 21,255.96 × 8,688.50
  4. Step 4: Simplify right side
    15,402.90x = 184,682,408.46
  5. Step 5: Solve for x
    x = 184,682,408.46/15,402.90
  6. Step 6: Final answer
    x = 11,990.11

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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.