Home / 15,510.74-21,416.83-11,920.01

Finding the Fourth Proportional to 15,510.74, 21,416.83 and 11,920.01

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Solution

The fourth proportional to 15,510.74, 21,416.83 and 11,920.01 is: 16,458.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,510.74 : 21,416.83 = 11,920.01 : x
  2. Step 2: Convert to fraction form
    15,510.74/21,416.83 = 11,920.01/x
  3. Step 3: Cross multiply
    15,510.74x = 21,416.83 × 11,920.01
  4. Step 4: Simplify right side
    15,510.74x = 255,288,690.88
  5. Step 5: Solve for x
    x = 255,288,690.88/15,510.74
  6. Step 6: Final answer
    x = 16,458.84

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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.