Home / 15,403.17-21,256.34-8,688.77

Finding the Fourth Proportional to 15,403.17, 21,256.34 and 8,688.77

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Solution

The fourth proportional to 15,403.17, 21,256.34 and 8,688.77 is: 11,990.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.17 : 21,256.34 = 8,688.77 : x
  2. Step 2: Convert to fraction form
    15,403.17/21,256.34 = 8,688.77/x
  3. Step 3: Cross multiply
    15,403.17x = 21,256.34 × 8,688.77
  4. Step 4: Simplify right side
    15,403.17x = 184,691,449.30
  5. Step 5: Solve for x
    x = 184,691,449.30/15,403.17
  6. Step 6: Final answer
    x = 11,990.48

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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.