Home / 15,555.54-21,465.87-8,840.28

Finding the Fourth Proportional to 15,555.54, 21,465.87 and 8,840.28

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Solution

The fourth proportional to 15,555.54, 21,465.87 and 8,840.28 is: 12,199.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,555.54 : 21,465.87 = 8,840.28 : x
  2. Step 2: Convert to fraction form
    15,555.54/21,465.87 = 8,840.28/x
  3. Step 3: Cross multiply
    15,555.54x = 21,465.87 × 8,840.28
  4. Step 4: Simplify right side
    15,555.54x = 189,764,301.24
  5. Step 5: Solve for x
    x = 189,764,301.24/15,555.54
  6. Step 6: Final answer
    x = 12,199.15

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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.