Home / 21,037.08-31,539.92-12,715.20

Finding the Fourth Proportional to 21,037.08, 31,539.92 and 12,715.20

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Solution

The fourth proportional to 21,037.08, 31,539.92 and 12,715.20 is: 19,063.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,037.08 : 31,539.92 = 12,715.20 : x
  2. Step 2: Convert to fraction form
    21,037.08/31,539.92 = 12,715.20/x
  3. Step 3: Cross multiply
    21,037.08x = 31,539.92 × 12,715.20
  4. Step 4: Simplify right side
    21,037.08x = 401,036,390.78
  5. Step 5: Solve for x
    x = 401,036,390.78/21,037.08
  6. Step 6: Final answer
    x = 19,063.31

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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.