Home / 15,690.90-21,646.14-10,022.76

Finding the Fourth Proportional to 15,690.90, 21,646.14 and 10,022.76

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Solution

The fourth proportional to 15,690.90, 21,646.14 and 10,022.76 is: 13,826.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.90 : 21,646.14 = 10,022.76 : x
  2. Step 2: Convert to fraction form
    15,690.90/21,646.14 = 10,022.76/x
  3. Step 3: Cross multiply
    15,690.90x = 21,646.14 × 10,022.76
  4. Step 4: Simplify right side
    15,690.90x = 216,954,066.15
  5. Step 5: Solve for x
    x = 216,954,066.15/15,690.90
  6. Step 6: Final answer
    x = 13,826.74

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Half scale
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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.