Home / 28,122.10-38,809.30-15,547.66

Finding the Fourth Proportional to 28,122.10, 38,809.30 and 15,547.66

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Solution

The fourth proportional to 28,122.10, 38,809.30 and 15,547.66 is: 21,456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,122.10 : 38,809.30 = 15,547.66 : x
  2. Step 2: Convert to fraction form
    28,122.10/38,809.30 = 15,547.66/x
  3. Step 3: Cross multiply
    28,122.10x = 38,809.30 × 15,547.66
  4. Step 4: Simplify right side
    28,122.10x = 603,393,607.19
  5. Step 5: Solve for x
    x = 603,393,607.19/28,122.10
  6. Step 6: Final answer
    x = 21,456.21

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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.