Home / 21,026.40-31,539.20-5,443.68

Finding the Fourth Proportional to 21,026.40, 31,539.20 and 5,443.68

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Solution

The fourth proportional to 21,026.40, 31,539.20 and 5,443.68 is: 8,165.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,026.40 : 31,539.20 = 5,443.68 : x
  2. Step 2: Convert to fraction form
    21,026.40/31,539.20 = 5,443.68/x
  3. Step 3: Cross multiply
    21,026.40x = 31,539.20 × 5,443.68
  4. Step 4: Simplify right side
    21,026.40x = 171,689,312.26
  5. Step 5: Solve for x
    x = 171,689,312.26/21,026.40
  6. Step 6: Final answer
    x = 8,165.42

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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.