Home / 19,386.70-29,080.05-12,820.30

Finding the Fourth Proportional to 19,386.70, 29,080.05 and 12,820.30

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Solution

The fourth proportional to 19,386.70, 29,080.05 and 12,820.30 is: 19,230.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,386.70 : 29,080.05 = 12,820.30 : x
  2. Step 2: Convert to fraction form
    19,386.70/29,080.05 = 12,820.30/x
  3. Step 3: Cross multiply
    19,386.70x = 29,080.05 × 12,820.30
  4. Step 4: Simplify right side
    19,386.70x = 372,814,965.02
  5. Step 5: Solve for x
    x = 372,814,965.02/19,386.70
  6. Step 6: Final answer
    x = 19,230.45

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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.