Home / 21,140.87-29,166.91-12,637.09

Finding the Fourth Proportional to 21,140.87, 29,166.91 and 12,637.09

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Solution

The fourth proportional to 21,140.87, 29,166.91 and 12,637.09 is: 17,434.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.87 : 29,166.91 = 12,637.09 : x
  2. Step 2: Convert to fraction form
    21,140.87/29,166.91 = 12,637.09/x
  3. Step 3: Cross multiply
    21,140.87x = 29,166.91 × 12,637.09
  4. Step 4: Simplify right side
    21,140.87x = 368,584,762.18
  5. Step 5: Solve for x
    x = 368,584,762.18/21,140.87
  6. Step 6: Final answer
    x = 17,434.70

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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.