Home / 21,145.48-31,737.66-19,875.40

Finding the Fourth Proportional to 21,145.48, 31,737.66 and 19,875.40

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Solution

The fourth proportional to 21,145.48, 31,737.66 and 19,875.40 is: 29,831.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.48 : 31,737.66 = 19,875.40 : x
  2. Step 2: Convert to fraction form
    21,145.48/31,737.66 = 19,875.40/x
  3. Step 3: Cross multiply
    21,145.48x = 31,737.66 × 19,875.40
  4. Step 4: Simplify right side
    21,145.48x = 630,798,687.56
  5. Step 5: Solve for x
    x = 630,798,687.56/21,145.48
  6. Step 6: Final answer
    x = 29,831.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.