Home / 21,038.20-31,557.30-10,648.60

Finding the Fourth Proportional to 21,038.20, 31,557.30 and 10,648.60

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Solution

The fourth proportional to 21,038.20, 31,557.30 and 10,648.60 is: 15,972.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.20 : 31,557.30 = 10,648.60 : x
  2. Step 2: Convert to fraction form
    21,038.20/31,557.30 = 10,648.60/x
  3. Step 3: Cross multiply
    21,038.20x = 31,557.30 × 10,648.60
  4. Step 4: Simplify right side
    21,038.20x = 336,041,064.78
  5. Step 5: Solve for x
    x = 336,041,064.78/21,038.20
  6. Step 6: Final answer
    x = 15,972.90

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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.