Home / 12,981.18-17,911.34-8,263.74

Finding the Fourth Proportional to 12,981.18, 17,911.34 and 8,263.74

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Solution

The fourth proportional to 12,981.18, 17,911.34 and 8,263.74 is: 11,402.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.18 : 17,911.34 = 8,263.74 : x
  2. Step 2: Convert to fraction form
    12,981.18/17,911.34 = 8,263.74/x
  3. Step 3: Cross multiply
    12,981.18x = 17,911.34 × 8,263.74
  4. Step 4: Simplify right side
    12,981.18x = 148,014,656.81
  5. Step 5: Solve for x
    x = 148,014,656.81/12,981.18
  6. Step 6: Final answer
    x = 11,402.25

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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.