Home / 28,521.21-39,378.64-17,770.40

Finding the Fourth Proportional to 28,521.21, 39,378.64 and 17,770.40

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Solution

The fourth proportional to 28,521.21, 39,378.64 and 17,770.40 is: 24,535.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,521.21 : 39,378.64 = 17,770.40 : x
  2. Step 2: Convert to fraction form
    28,521.21/39,378.64 = 17,770.40/x
  3. Step 3: Cross multiply
    28,521.21x = 39,378.64 × 17,770.40
  4. Step 4: Simplify right side
    28,521.21x = 699,774,254.27
  5. Step 5: Solve for x
    x = 699,774,254.27/28,521.21
  6. Step 6: Final answer
    x = 24,535.22

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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.