Home / 15,570.89-21,487.71-8,856.51

Finding the Fourth Proportional to 15,570.89, 21,487.71 and 8,856.51

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Solution

The fourth proportional to 15,570.89, 21,487.71 and 8,856.51 is: 12,221.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,570.89 : 21,487.71 = 8,856.51 : x
  2. Step 2: Convert to fraction form
    15,570.89/21,487.71 = 8,856.51/x
  3. Step 3: Cross multiply
    15,570.89x = 21,487.71 × 8,856.51
  4. Step 4: Simplify right side
    15,570.89x = 190,306,118.49
  5. Step 5: Solve for x
    x = 190,306,118.49/15,570.89
  6. Step 6: Final answer
    x = 12,221.92

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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.