Home / 20,875.29-31,126.74-18,557.07

Finding the Fourth Proportional to 20,875.29, 31,126.74 and 18,557.07

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Solution

The fourth proportional to 20,875.29, 31,126.74 and 18,557.07 is: 27,670.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.29 : 31,126.74 = 18,557.07 : x
  2. Step 2: Convert to fraction form
    20,875.29/31,126.74 = 18,557.07/x
  3. Step 3: Cross multiply
    20,875.29x = 31,126.74 × 18,557.07
  4. Step 4: Simplify right side
    20,875.29x = 577,621,093.05
  5. Step 5: Solve for x
    x = 577,621,093.05/20,875.29
  6. Step 6: Final answer
    x = 27,670.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.