Home / 15,528.16-21,429.30-8,454.70

Finding the Fourth Proportional to 15,528.16, 21,429.30 and 8,454.70

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Solution

The fourth proportional to 15,528.16, 21,429.30 and 8,454.70 is: 11,667.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.16 : 21,429.30 = 8,454.70 : x
  2. Step 2: Convert to fraction form
    15,528.16/21,429.30 = 8,454.70/x
  3. Step 3: Cross multiply
    15,528.16x = 21,429.30 × 8,454.70
  4. Step 4: Simplify right side
    15,528.16x = 181,178,302.71
  5. Step 5: Solve for x
    x = 181,178,302.71/15,528.16
  6. Step 6: Final answer
    x = 11,667.73

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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.