Home / 15,780.99-21,768.58-10,113.72

Finding the Fourth Proportional to 15,780.99, 21,768.58 and 10,113.72

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Solution

The fourth proportional to 15,780.99, 21,768.58 and 10,113.72 is: 13,951.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.99 : 21,768.58 = 10,113.72 : x
  2. Step 2: Convert to fraction form
    15,780.99/21,768.58 = 10,113.72/x
  3. Step 3: Cross multiply
    15,780.99x = 21,768.58 × 10,113.72
  4. Step 4: Simplify right side
    15,780.99x = 220,161,322.92
  5. Step 5: Solve for x
    x = 220,161,322.92/15,780.99
  6. Step 6: Final answer
    x = 13,951.05

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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.