Home / 21,039.40-29,037.54-12,657.64

Finding the Fourth Proportional to 21,039.40, 29,037.54 and 12,657.64

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Solution

The fourth proportional to 21,039.40, 29,037.54 and 12,657.64 is: 17,469.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.40 : 29,037.54 = 12,657.64 : x
  2. Step 2: Convert to fraction form
    21,039.40/29,037.54 = 12,657.64/x
  3. Step 3: Cross multiply
    21,039.40x = 29,037.54 × 12,657.64
  4. Step 4: Simplify right side
    21,039.40x = 367,546,727.81
  5. Step 5: Solve for x
    x = 367,546,727.81/21,039.40
  6. Step 6: Final answer
    x = 17,469.45

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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.