Home / 15,533.25-21,417.34-12,690.15

Finding the Fourth Proportional to 15,533.25, 21,417.34 and 12,690.15

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Solution

The fourth proportional to 15,533.25, 21,417.34 and 12,690.15 is: 17,497.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,533.25 : 21,417.34 = 12,690.15 : x
  2. Step 2: Convert to fraction form
    15,533.25/21,417.34 = 12,690.15/x
  3. Step 3: Cross multiply
    15,533.25x = 21,417.34 × 12,690.15
  4. Step 4: Simplify right side
    15,533.25x = 271,789,305.79
  5. Step 5: Solve for x
    x = 271,789,305.79/15,533.25
  6. Step 6: Final answer
    x = 17,497.26

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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.