Home / 12,261.90-18,402.45-5,688.90

Finding the Fourth Proportional to 12,261.90, 18,402.45 and 5,688.90

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Solution

The fourth proportional to 12,261.90, 18,402.45 and 5,688.90 is: 8,537.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.90 : 18,402.45 = 5,688.90 : x
  2. Step 2: Convert to fraction form
    12,261.90/18,402.45 = 5,688.90/x
  3. Step 3: Cross multiply
    12,261.90x = 18,402.45 × 5,688.90
  4. Step 4: Simplify right side
    12,261.90x = 104,689,697.81
  5. Step 5: Solve for x
    x = 104,689,697.81/12,261.90
  6. Step 6: Final answer
    x = 8,537.80

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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.