Home / 21,184.68-29,235.77-12,688.19

Finding the Fourth Proportional to 21,184.68, 29,235.77 and 12,688.19

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Solution

The fourth proportional to 21,184.68, 29,235.77 and 12,688.19 is: 17,510.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,184.68 : 29,235.77 = 12,688.19 : x
  2. Step 2: Convert to fraction form
    21,184.68/29,235.77 = 12,688.19/x
  3. Step 3: Cross multiply
    21,184.68x = 29,235.77 × 12,688.19
  4. Step 4: Simplify right side
    21,184.68x = 370,948,890.10
  5. Step 5: Solve for x
    x = 370,948,890.10/21,184.68
  6. Step 6: Final answer
    x = 17,510.24

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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.