Home / 21,120.30-29,145.95-11,429.74

Finding the Fourth Proportional to 21,120.30, 29,145.95 and 11,429.74

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Solution

The fourth proportional to 21,120.30, 29,145.95 and 11,429.74 is: 15,773.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.30 : 29,145.95 = 11,429.74 : x
  2. Step 2: Convert to fraction form
    21,120.30/29,145.95 = 11,429.74/x
  3. Step 3: Cross multiply
    21,120.30x = 29,145.95 × 11,429.74
  4. Step 4: Simplify right side
    21,120.30x = 333,130,636.63
  5. Step 5: Solve for x
    x = 333,130,636.63/21,120.30
  6. Step 6: Final answer
    x = 15,773.00

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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.