Home / 13,547.50-20,422.79-12,644.35

Finding the Fourth Proportional to 13,547.50, 20,422.79 and 12,644.35

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Solution

The fourth proportional to 13,547.50, 20,422.79 and 12,644.35 is: 19,061.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,547.50 : 20,422.79 = 12,644.35 : x
  2. Step 2: Convert to fraction form
    13,547.50/20,422.79 = 12,644.35/x
  3. Step 3: Cross multiply
    13,547.50x = 20,422.79 × 12,644.35
  4. Step 4: Simplify right side
    13,547.50x = 258,232,977.68
  5. Step 5: Solve for x
    x = 258,232,977.68/13,547.50
  6. Step 6: Final answer
    x = 19,061.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.