Home / 21,420.12-29,569.86-14,351.16

Finding the Fourth Proportional to 21,420.12, 29,569.86 and 14,351.16

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Solution

The fourth proportional to 21,420.12, 29,569.86 and 14,351.16 is: 19,811.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.12 : 29,569.86 = 14,351.16 : x
  2. Step 2: Convert to fraction form
    21,420.12/29,569.86 = 14,351.16/x
  3. Step 3: Cross multiply
    21,420.12x = 29,569.86 × 14,351.16
  4. Step 4: Simplify right side
    21,420.12x = 424,361,792.04
  5. Step 5: Solve for x
    x = 424,361,792.04/21,420.12
  6. Step 6: Final answer
    x = 19,811.36

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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.