Home / 18,917.30-26,088.63-15,140.81

Finding the Fourth Proportional to 18,917.30, 26,088.63 and 15,140.81

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Solution

The fourth proportional to 18,917.30, 26,088.63 and 15,140.81 is: 20,880.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.30 : 26,088.63 = 15,140.81 : x
  2. Step 2: Convert to fraction form
    18,917.30/26,088.63 = 15,140.81/x
  3. Step 3: Cross multiply
    18,917.30x = 26,088.63 × 15,140.81
  4. Step 4: Simplify right side
    18,917.30x = 395,002,989.99
  5. Step 5: Solve for x
    x = 395,002,989.99/18,917.30
  6. Step 6: Final answer
    x = 20,880.52

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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.