Home / 21,240.51-29,312.54-12,290.82

Finding the Fourth Proportional to 21,240.51, 29,312.54 and 12,290.82

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Solution

The fourth proportional to 21,240.51, 29,312.54 and 12,290.82 is: 16,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.51 : 29,312.54 = 12,290.82 : x
  2. Step 2: Convert to fraction form
    21,240.51/29,312.54 = 12,290.82/x
  3. Step 3: Cross multiply
    21,240.51x = 29,312.54 × 12,290.82
  4. Step 4: Simplify right side
    21,240.51x = 360,275,152.88
  5. Step 5: Solve for x
    x = 360,275,152.88/21,240.51
  6. Step 6: Final answer
    x = 16,961.70

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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.