Home / 15,528.20-21,429.29-8,455.01

Finding the Fourth Proportional to 15,528.20, 21,429.29 and 8,455.01

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Solution

The fourth proportional to 15,528.20, 21,429.29 and 8,455.01 is: 11,668.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.20 : 21,429.29 = 8,455.01 : x
  2. Step 2: Convert to fraction form
    15,528.20/21,429.29 = 8,455.01/x
  3. Step 3: Cross multiply
    15,528.20x = 21,429.29 × 8,455.01
  4. Step 4: Simplify right side
    15,528.20x = 181,184,775.23
  5. Step 5: Solve for x
    x = 181,184,775.23/15,528.20
  6. Step 6: Final answer
    x = 11,668.12

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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.