Home / 12,531.58-18,686.74-12,419.10

Finding the Fourth Proportional to 12,531.58, 18,686.74 and 12,419.10

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Solution

The fourth proportional to 12,531.58, 18,686.74 and 12,419.10 is: 18,519.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,531.58 : 18,686.74 = 12,419.10 : x
  2. Step 2: Convert to fraction form
    12,531.58/18,686.74 = 12,419.10/x
  3. Step 3: Cross multiply
    12,531.58x = 18,686.74 × 12,419.10
  4. Step 4: Simplify right side
    12,531.58x = 232,072,492.73
  5. Step 5: Solve for x
    x = 232,072,492.73/12,531.58
  6. Step 6: Final answer
    x = 18,519.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.