Home / 21,140.16-29,160.60-13,970.13

Finding the Fourth Proportional to 21,140.16, 29,160.60 and 13,970.13

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Solution

The fourth proportional to 21,140.16, 29,160.60 and 13,970.13 is: 19,270.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.16 : 29,160.60 = 13,970.13 : x
  2. Step 2: Convert to fraction form
    21,140.16/29,160.60 = 13,970.13/x
  3. Step 3: Cross multiply
    21,140.16x = 29,160.60 × 13,970.13
  4. Step 4: Simplify right side
    21,140.16x = 407,377,372.88
  5. Step 5: Solve for x
    x = 407,377,372.88/21,140.16
  6. Step 6: Final answer
    x = 19,270.31

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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.