Home / 21,296.40-29,388.96-12,345.72

Finding the Fourth Proportional to 21,296.40, 29,388.96 and 12,345.72

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Solution

The fourth proportional to 21,296.40, 29,388.96 and 12,345.72 is: 17,037.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,296.40 : 29,388.96 = 12,345.72 : x
  2. Step 2: Convert to fraction form
    21,296.40/29,388.96 = 12,345.72/x
  3. Step 3: Cross multiply
    21,296.40x = 29,388.96 × 12,345.72
  4. Step 4: Simplify right side
    21,296.40x = 362,827,871.25
  5. Step 5: Solve for x
    x = 362,827,871.25/21,296.40
  6. Step 6: Final answer
    x = 17,037.05

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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.