Home / 21,012.60-31,432.79-19,165.27

Finding the Fourth Proportional to 21,012.60, 31,432.79 and 19,165.27

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Solution

The fourth proportional to 21,012.60, 31,432.79 and 19,165.27 is: 28,669.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.60 : 31,432.79 = 19,165.27 : x
  2. Step 2: Convert to fraction form
    21,012.60/31,432.79 = 19,165.27/x
  3. Step 3: Cross multiply
    21,012.60x = 31,432.79 × 19,165.27
  4. Step 4: Simplify right side
    21,012.60x = 602,417,907.20
  5. Step 5: Solve for x
    x = 602,417,907.20/21,012.60
  6. Step 6: Final answer
    x = 28,669.37

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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.