Home / 15,931.89-21,985.88-8,858.25

Finding the Fourth Proportional to 15,931.89, 21,985.88 and 8,858.25

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Solution

The fourth proportional to 15,931.89, 21,985.88 and 8,858.25 is: 12,224.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.89 : 21,985.88 = 8,858.25 : x
  2. Step 2: Convert to fraction form
    15,931.89/21,985.88 = 8,858.25/x
  3. Step 3: Cross multiply
    15,931.89x = 21,985.88 × 8,858.25
  4. Step 4: Simplify right side
    15,931.89x = 194,756,377.22
  5. Step 5: Solve for x
    x = 194,756,377.22/15,931.89
  6. Step 6: Final answer
    x = 12,224.31

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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.