Home / 28,254.74-38,989.59-15,678.50

Finding the Fourth Proportional to 28,254.74, 38,989.59 and 15,678.50

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Solution

The fourth proportional to 28,254.74, 38,989.59 and 15,678.50 is: 21,635.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.74 : 38,989.59 = 15,678.50 : x
  2. Step 2: Convert to fraction form
    28,254.74/38,989.59 = 15,678.50/x
  3. Step 3: Cross multiply
    28,254.74x = 38,989.59 × 15,678.50
  4. Step 4: Simplify right side
    28,254.74x = 611,298,286.82
  5. Step 5: Solve for x
    x = 611,298,286.82/28,254.74
  6. Step 6: Final answer
    x = 21,635.25

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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.