Home / 15,886.17-21,918.47-12,518.53

Finding the Fourth Proportional to 15,886.17, 21,918.47 and 12,518.53

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Solution

The fourth proportional to 15,886.17, 21,918.47 and 12,518.53 is: 17,272.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.17 : 21,918.47 = 12,518.53 : x
  2. Step 2: Convert to fraction form
    15,886.17/21,918.47 = 12,518.53/x
  3. Step 3: Cross multiply
    15,886.17x = 21,918.47 × 12,518.53
  4. Step 4: Simplify right side
    15,886.17x = 274,386,906.86
  5. Step 5: Solve for x
    x = 274,386,906.86/15,886.17
  6. Step 6: Final answer
    x = 17,272.06

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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.