Home / 28,436.40-39,236.40-21,710.16

Finding the Fourth Proportional to 28,436.40, 39,236.40 and 21,710.16

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Solution

The fourth proportional to 28,436.40, 39,236.40 and 21,710.16 is: 29,955.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.40 : 39,236.40 = 21,710.16 : x
  2. Step 2: Convert to fraction form
    28,436.40/39,236.40 = 21,710.16/x
  3. Step 3: Cross multiply
    28,436.40x = 39,236.40 × 21,710.16
  4. Step 4: Simplify right side
    28,436.40x = 851,828,521.82
  5. Step 5: Solve for x
    x = 851,828,521.82/28,436.40
  6. Step 6: Final answer
    x = 29,955.57

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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.