Home / 22,138.47-30,547.62-12,705.21

Finding the Fourth Proportional to 22,138.47, 30,547.62 and 12,705.21

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Solution

The fourth proportional to 22,138.47, 30,547.62 and 12,705.21 is: 17,531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,138.47 : 30,547.62 = 12,705.21 : x
  2. Step 2: Convert to fraction form
    22,138.47/30,547.62 = 12,705.21/x
  3. Step 3: Cross multiply
    22,138.47x = 30,547.62 × 12,705.21
  4. Step 4: Simplify right side
    22,138.47x = 388,113,927.10
  5. Step 5: Solve for x
    x = 388,113,927.10/22,138.47
  6. Step 6: Final answer
    x = 17,531.20

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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.