Home / 21,434.13-29,579.16-12,487.77

Finding the Fourth Proportional to 21,434.13, 29,579.16 and 12,487.77

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Solution

The fourth proportional to 21,434.13, 29,579.16 and 12,487.77 is: 17,233.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,434.13 : 29,579.16 = 12,487.77 : x
  2. Step 2: Convert to fraction form
    21,434.13/29,579.16 = 12,487.77/x
  3. Step 3: Cross multiply
    21,434.13x = 29,579.16 × 12,487.77
  4. Step 4: Simplify right side
    21,434.13x = 369,377,746.87
  5. Step 5: Solve for x
    x = 369,377,746.87/21,434.13
  6. Step 6: Final answer
    x = 17,233.16

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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.