Home / 19,407.40-29,078.70-12,830.20

Finding the Fourth Proportional to 19,407.40, 29,078.70 and 12,830.20

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Solution

The fourth proportional to 19,407.40, 29,078.70 and 12,830.20 is: 19,223.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,407.40 : 29,078.70 = 12,830.20 : x
  2. Step 2: Convert to fraction form
    19,407.40/29,078.70 = 12,830.20/x
  3. Step 3: Cross multiply
    19,407.40x = 29,078.70 × 12,830.20
  4. Step 4: Simplify right side
    19,407.40x = 373,085,536.74
  5. Step 5: Solve for x
    x = 373,085,536.74/19,407.40
  6. Step 6: Final answer
    x = 19,223.88

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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.