Home / 15,873.18-21,900.56-12,505.55

Finding the Fourth Proportional to 15,873.18, 21,900.56 and 12,505.55

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Solution

The fourth proportional to 15,873.18, 21,900.56 and 12,505.55 is: 17,254.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,873.18 : 21,900.56 = 12,505.55 : x
  2. Step 2: Convert to fraction form
    15,873.18/21,900.56 = 12,505.55/x
  3. Step 3: Cross multiply
    15,873.18x = 21,900.56 × 12,505.55
  4. Step 4: Simplify right side
    15,873.18x = 273,878,376.08
  5. Step 5: Solve for x
    x = 273,878,376.08/15,873.18
  6. Step 6: Final answer
    x = 17,254.16

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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.