Home / 15,875.30-21,907.03-8,705.21

Finding the Fourth Proportional to 15,875.30, 21,907.03 and 8,705.21

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Solution

The fourth proportional to 15,875.30, 21,907.03 and 8,705.21 is: 12,012.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,875.30 : 21,907.03 = 8,705.21 : x
  2. Step 2: Convert to fraction form
    15,875.30/21,907.03 = 8,705.21/x
  3. Step 3: Cross multiply
    15,875.30x = 21,907.03 × 8,705.21
  4. Step 4: Simplify right side
    15,875.30x = 190,705,296.63
  5. Step 5: Solve for x
    x = 190,705,296.63/15,875.30
  6. Step 6: Final answer
    x = 12,012.71

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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.