Home / 21,426.90-29,559.31-13,875.66

Finding the Fourth Proportional to 21,426.90, 29,559.31 and 13,875.66

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Solution

The fourth proportional to 21,426.90, 29,559.31 and 13,875.66 is: 19,142.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,426.90 : 29,559.31 = 13,875.66 : x
  2. Step 2: Convert to fraction form
    21,426.90/29,559.31 = 13,875.66/x
  3. Step 3: Cross multiply
    21,426.90x = 29,559.31 × 13,875.66
  4. Step 4: Simplify right side
    21,426.90x = 410,154,900.71
  5. Step 5: Solve for x
    x = 410,154,900.71/21,426.90
  6. Step 6: Final answer
    x = 19,142.06

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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.