Home / 21,400.29-31,943.64-18,875.27

Finding the Fourth Proportional to 21,400.29, 31,943.64 and 18,875.27

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Solution

The fourth proportional to 21,400.29, 31,943.64 and 18,875.27 is: 28,174.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,400.29 : 31,943.64 = 18,875.27 : x
  2. Step 2: Convert to fraction form
    21,400.29/31,943.64 = 18,875.27/x
  3. Step 3: Cross multiply
    21,400.29x = 31,943.64 × 18,875.27
  4. Step 4: Simplify right side
    21,400.29x = 602,944,670.06
  5. Step 5: Solve for x
    x = 602,944,670.06/21,400.29
  6. Step 6: Final answer
    x = 28,174.60

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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.