Home / 21,240.48-29,312-11,809.12

Finding the Fourth Proportional to 21,240.48, 29,312 and 11,809.12

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Solution

The fourth proportional to 21,240.48, 29,312 and 11,809.12 is: 16,296.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.48 : 29,312 = 11,809.12 : x
  2. Step 2: Convert to fraction form
    21,240.48/29,312 = 11,809.12/x
  3. Step 3: Cross multiply
    21,240.48x = 29,312 × 11,809.12
  4. Step 4: Simplify right side
    21,240.48x = 346,148,925.44
  5. Step 5: Solve for x
    x = 346,148,925.44/21,240.48
  6. Step 6: Final answer
    x = 16,296.66

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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.