Home / 15,402.56-21,256.28-8,688.05

Finding the Fourth Proportional to 15,402.56, 21,256.28 and 8,688.05

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Solution

The fourth proportional to 15,402.56, 21,256.28 and 8,688.05 is: 11,989.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,402.56 : 21,256.28 = 8,688.05 : x
  2. Step 2: Convert to fraction form
    15,402.56/21,256.28 = 8,688.05/x
  3. Step 3: Cross multiply
    15,402.56x = 21,256.28 × 8,688.05
  4. Step 4: Simplify right side
    15,402.56x = 184,675,698.31
  5. Step 5: Solve for x
    x = 184,675,698.31/15,402.56
  6. Step 6: Final answer
    x = 11,989.93

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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.