Home / 21,479.10-29,639.55-12,525.49

Finding the Fourth Proportional to 21,479.10, 29,639.55 and 12,525.49

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Solution

The fourth proportional to 21,479.10, 29,639.55 and 12,525.49 is: 17,284.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,479.10 : 29,639.55 = 12,525.49 : x
  2. Step 2: Convert to fraction form
    21,479.10/29,639.55 = 12,525.49/x
  3. Step 3: Cross multiply
    21,479.10x = 29,639.55 × 12,525.49
  4. Step 4: Simplify right side
    21,479.10x = 371,249,887.13
  5. Step 5: Solve for x
    x = 371,249,887.13/21,479.10
  6. Step 6: Final answer
    x = 17,284.24

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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.