Home / 15,401.64-21,253.69-8,688.16

Finding the Fourth Proportional to 15,401.64, 21,253.69 and 8,688.16

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Solution

The fourth proportional to 15,401.64, 21,253.69 and 8,688.16 is: 11,989.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,401.64 : 21,253.69 = 8,688.16 : x
  2. Step 2: Convert to fraction form
    15,401.64/21,253.69 = 8,688.16/x
  3. Step 3: Cross multiply
    15,401.64x = 21,253.69 × 8,688.16
  4. Step 4: Simplify right side
    15,401.64x = 184,655,496.74
  5. Step 5: Solve for x
    x = 184,655,496.74/15,401.64
  6. Step 6: Final answer
    x = 11,989.34

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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.