Home / 15,315.99-21,140.65-8,944.30

Finding the Fourth Proportional to 15,315.99, 21,140.65 and 8,944.30

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Solution

The fourth proportional to 15,315.99, 21,140.65 and 8,944.30 is: 12,345.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.99 : 21,140.65 = 8,944.30 : x
  2. Step 2: Convert to fraction form
    15,315.99/21,140.65 = 8,944.30/x
  3. Step 3: Cross multiply
    15,315.99x = 21,140.65 × 8,944.30
  4. Step 4: Simplify right side
    15,315.99x = 189,088,315.80
  5. Step 5: Solve for x
    x = 189,088,315.80/15,315.99
  6. Step 6: Final answer
    x = 12,345.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.