Home / 28,382.40-39,161.88-21,656.16

Finding the Fourth Proportional to 28,382.40, 39,161.88 and 21,656.16

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Solution

The fourth proportional to 28,382.40, 39,161.88 and 21,656.16 is: 29,881.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.40 : 39,161.88 = 21,656.16 : x
  2. Step 2: Convert to fraction form
    28,382.40/39,161.88 = 21,656.16/x
  3. Step 3: Cross multiply
    28,382.40x = 39,161.88 × 21,656.16
  4. Step 4: Simplify right side
    28,382.40x = 848,095,939.18
  5. Step 5: Solve for x
    x = 848,095,939.18/28,382.40
  6. Step 6: Final answer
    x = 29,881.05

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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.