Home / 18,900.48-28,341.36-7,803.12

Finding the Fourth Proportional to 18,900.48, 28,341.36 and 7,803.12

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Solution

The fourth proportional to 18,900.48, 28,341.36 and 7,803.12 is: 11,700.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.48 : 28,341.36 = 7,803.12 : x
  2. Step 2: Convert to fraction form
    18,900.48/28,341.36 = 7,803.12/x
  3. Step 3: Cross multiply
    18,900.48x = 28,341.36 × 7,803.12
  4. Step 4: Simplify right side
    18,900.48x = 221,151,033.04
  5. Step 5: Solve for x
    x = 221,151,033.04/18,900.48
  6. Step 6: Final answer
    x = 11,700.82

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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.