Home / 21,113.90-29,140.27-12,159.66

Finding the Fourth Proportional to 21,113.90, 29,140.27 and 12,159.66

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Solution

The fourth proportional to 21,113.90, 29,140.27 and 12,159.66 is: 16,782.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.90 : 29,140.27 = 12,159.66 : x
  2. Step 2: Convert to fraction form
    21,113.90/29,140.27 = 12,159.66/x
  3. Step 3: Cross multiply
    21,113.90x = 29,140.27 × 12,159.66
  4. Step 4: Simplify right side
    21,113.90x = 354,335,775.51
  5. Step 5: Solve for x
    x = 354,335,775.51/21,113.90
  6. Step 6: Final answer
    x = 16,782.11

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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.