Home / 15,570.80-21,487.74-8,856.28

Finding the Fourth Proportional to 15,570.80, 21,487.74 and 8,856.28

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Solution

The fourth proportional to 15,570.80, 21,487.74 and 8,856.28 is: 12,221.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,570.80 : 21,487.74 = 8,856.28 : x
  2. Step 2: Convert to fraction form
    15,570.80/21,487.74 = 8,856.28/x
  3. Step 3: Cross multiply
    15,570.80x = 21,487.74 × 8,856.28
  4. Step 4: Simplify right side
    15,570.80x = 190,301,442.01
  5. Step 5: Solve for x
    x = 190,301,442.01/15,570.80
  6. Step 6: Final answer
    x = 12,221.69

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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.