Home / 21,117.60-29,139.41-12,617.93

Finding the Fourth Proportional to 21,117.60, 29,139.41 and 12,617.93

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Solution

The fourth proportional to 21,117.60, 29,139.41 and 12,617.93 is: 17,411.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.60 : 29,139.41 = 12,617.93 : x
  2. Step 2: Convert to fraction form
    21,117.60/29,139.41 = 12,617.93/x
  3. Step 3: Cross multiply
    21,117.60x = 29,139.41 × 12,617.93
  4. Step 4: Simplify right side
    21,117.60x = 367,678,826.83
  5. Step 5: Solve for x
    x = 367,678,826.83/21,117.60
  6. Step 6: Final answer
    x = 17,411.01

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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.