Home / 15,688.85-21,650.88-8,518.77

Finding the Fourth Proportional to 15,688.85, 21,650.88 and 8,518.77

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Solution

The fourth proportional to 15,688.85, 21,650.88 and 8,518.77 is: 11,756.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.85 : 21,650.88 = 8,518.77 : x
  2. Step 2: Convert to fraction form
    15,688.85/21,650.88 = 8,518.77/x
  3. Step 3: Cross multiply
    15,688.85x = 21,650.88 × 8,518.77
  4. Step 4: Simplify right side
    15,688.85x = 184,438,867.02
  5. Step 5: Solve for x
    x = 184,438,867.02/15,688.85
  6. Step 6: Final answer
    x = 11,756.05

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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.