Home / 15,475.81-21,355.51-8,762.20

Finding the Fourth Proportional to 15,475.81, 21,355.51 and 8,762.20

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Solution

The fourth proportional to 15,475.81, 21,355.51 and 8,762.20 is: 12,091.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,475.81 : 21,355.51 = 8,762.20 : x
  2. Step 2: Convert to fraction form
    15,475.81/21,355.51 = 8,762.20/x
  3. Step 3: Cross multiply
    15,475.81x = 21,355.51 × 8,762.20
  4. Step 4: Simplify right side
    15,475.81x = 187,121,249.72
  5. Step 5: Solve for x
    x = 187,121,249.72/15,475.81
  6. Step 6: Final answer
    x = 12,091.21

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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.