Home / 21,035.20-31,563.84-7,896.64

Finding the Fourth Proportional to 21,035.20, 31,563.84 and 7,896.64

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Solution

The fourth proportional to 21,035.20, 31,563.84 and 7,896.64 is: 11,849.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,035.20 : 31,563.84 = 7,896.64 : x
  2. Step 2: Convert to fraction form
    21,035.20/31,563.84 = 7,896.64/x
  3. Step 3: Cross multiply
    21,035.20x = 31,563.84 × 7,896.64
  4. Step 4: Simplify right side
    21,035.20x = 249,248,281.50
  5. Step 5: Solve for x
    x = 249,248,281.50/21,035.20
  6. Step 6: Final answer
    x = 11,849.10

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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.