Home / 15,528.78-21,429.58-8,455.18

Finding the Fourth Proportional to 15,528.78, 21,429.58 and 8,455.18

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Solution

The fourth proportional to 15,528.78, 21,429.58 and 8,455.18 is: 11,668.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.78 : 21,429.58 = 8,455.18 : x
  2. Step 2: Convert to fraction form
    15,528.78/21,429.58 = 8,455.18/x
  3. Step 3: Cross multiply
    15,528.78x = 21,429.58 × 8,455.18
  4. Step 4: Simplify right side
    15,528.78x = 181,190,956.22
  5. Step 5: Solve for x
    x = 181,190,956.22/15,528.78
  6. Step 6: Final answer
    x = 11,668.07

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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.