Home / 15,402.93-21,256.05-8,688.54

Finding the Fourth Proportional to 15,402.93, 21,256.05 and 8,688.54

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Solution

The fourth proportional to 15,402.93, 21,256.05 and 8,688.54 is: 11,990.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,402.93 : 21,256.05 = 8,688.54 : x
  2. Step 2: Convert to fraction form
    15,402.93/21,256.05 = 8,688.54/x
  3. Step 3: Cross multiply
    15,402.93x = 21,256.05 × 8,688.54
  4. Step 4: Simplify right side
    15,402.93x = 184,684,019.87
  5. Step 5: Solve for x
    x = 184,684,019.87/15,402.93
  6. Step 6: Final answer
    x = 11,990.18

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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.