Home / 22,117.12-30,519.04-12,688.80

Finding the Fourth Proportional to 22,117.12, 30,519.04 and 12,688.80

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Solution

The fourth proportional to 22,117.12, 30,519.04 and 12,688.80 is: 17,509.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,117.12 : 30,519.04 = 12,688.80 : x
  2. Step 2: Convert to fraction form
    22,117.12/30,519.04 = 12,688.80/x
  3. Step 3: Cross multiply
    22,117.12x = 30,519.04 × 12,688.80
  4. Step 4: Simplify right side
    22,117.12x = 387,249,994.75
  5. Step 5: Solve for x
    x = 387,249,994.75/22,117.12
  6. Step 6: Final answer
    x = 17,509.06

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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.