Home / 28,547.58-39,433.32-21,915.18

Finding the Fourth Proportional to 28,547.58, 39,433.32 and 21,915.18

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Solution

The fourth proportional to 28,547.58, 39,433.32 and 21,915.18 is: 30,271.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,547.58 : 39,433.32 = 21,915.18 : x
  2. Step 2: Convert to fraction form
    28,547.58/39,433.32 = 21,915.18/x
  3. Step 3: Cross multiply
    28,547.58x = 39,433.32 × 21,915.18
  4. Step 4: Simplify right side
    28,547.58x = 864,188,305.80
  5. Step 5: Solve for x
    x = 864,188,305.80/28,547.58
  6. Step 6: Final answer
    x = 30,271.86

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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.