Home / 15,528.64-21,428.80-8,454.64

Finding the Fourth Proportional to 15,528.64, 21,428.80 and 8,454.64

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Solution

The fourth proportional to 15,528.64, 21,428.80 and 8,454.64 is: 11,667.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.64 : 21,428.80 = 8,454.64 : x
  2. Step 2: Convert to fraction form
    15,528.64/21,428.80 = 8,454.64/x
  3. Step 3: Cross multiply
    15,528.64x = 21,428.80 × 8,454.64
  4. Step 4: Simplify right side
    15,528.64x = 181,172,789.63
  5. Step 5: Solve for x
    x = 181,172,789.63/15,528.64
  6. Step 6: Final answer
    x = 11,667.01

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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.