Home / 21,312.81-29,410.17-12,698.55

Finding the Fourth Proportional to 21,312.81, 29,410.17 and 12,698.55

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Solution

The fourth proportional to 21,312.81, 29,410.17 and 12,698.55 is: 17,523.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.81 : 29,410.17 = 12,698.55 : x
  2. Step 2: Convert to fraction form
    21,312.81/29,410.17 = 12,698.55/x
  3. Step 3: Cross multiply
    21,312.81x = 29,410.17 × 12,698.55
  4. Step 4: Simplify right side
    21,312.81x = 373,466,514.25
  5. Step 5: Solve for x
    x = 373,466,514.25/21,312.81
  6. Step 6: Final answer
    x = 17,523.10

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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.