Home / 12,875.60-19,315.16-3,991.64

Finding the Fourth Proportional to 12,875.60, 19,315.16 and 3,991.64

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Solution

The fourth proportional to 12,875.60, 19,315.16 and 3,991.64 is: 5,988.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,875.60 : 19,315.16 = 3,991.64 : x
  2. Step 2: Convert to fraction form
    12,875.60/19,315.16 = 3,991.64/x
  3. Step 3: Cross multiply
    12,875.60x = 19,315.16 × 3,991.64
  4. Step 4: Simplify right side
    12,875.60x = 77,099,165.26
  5. Step 5: Solve for x
    x = 77,099,165.26/12,875.60
  6. Step 6: Final answer
    x = 5,988.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.