Home / 21,411.31-32,075.40-15,778.75

Finding the Fourth Proportional to 21,411.31, 32,075.40 and 15,778.75

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Solution

The fourth proportional to 21,411.31, 32,075.40 and 15,778.75 is: 23,637.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,411.31 : 32,075.40 = 15,778.75 : x
  2. Step 2: Convert to fraction form
    21,411.31/32,075.40 = 15,778.75/x
  3. Step 3: Cross multiply
    21,411.31x = 32,075.40 × 15,778.75
  4. Step 4: Simplify right side
    21,411.31x = 506,109,717.75
  5. Step 5: Solve for x
    x = 506,109,717.75/21,411.31
  6. Step 6: Final answer
    x = 23,637.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.