Home / 10,178.51-15,245.21-7,821.16

Finding the Fourth Proportional to 10,178.51, 15,245.21 and 7,821.16

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Solution

The fourth proportional to 10,178.51, 15,245.21 and 7,821.16 is: 11,714.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,178.51 : 15,245.21 = 7,821.16 : x
  2. Step 2: Convert to fraction form
    10,178.51/15,245.21 = 7,821.16/x
  3. Step 3: Cross multiply
    10,178.51x = 15,245.21 × 7,821.16
  4. Step 4: Simplify right side
    10,178.51x = 119,235,206.59
  5. Step 5: Solve for x
    x = 119,235,206.59/10,178.51
  6. Step 6: Final answer
    x = 11,714.41

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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.