Home / 15,639.32-21,581.45-8,564.38

Finding the Fourth Proportional to 15,639.32, 21,581.45 and 8,564.38

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Solution

The fourth proportional to 15,639.32, 21,581.45 and 8,564.38 is: 11,818.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,639.32 : 21,581.45 = 8,564.38 : x
  2. Step 2: Convert to fraction form
    15,639.32/21,581.45 = 8,564.38/x
  3. Step 3: Cross multiply
    15,639.32x = 21,581.45 × 8,564.38
  4. Step 4: Simplify right side
    15,639.32x = 184,831,738.75
  5. Step 5: Solve for x
    x = 184,831,738.75/15,639.32
  6. Step 6: Final answer
    x = 11,818.40

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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.