Home / 15,478.19-21,356.36-8,762.88

Finding the Fourth Proportional to 15,478.19, 21,356.36 and 8,762.88

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Solution

The fourth proportional to 15,478.19, 21,356.36 and 8,762.88 is: 12,090.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.19 : 21,356.36 = 8,762.88 : x
  2. Step 2: Convert to fraction form
    15,478.19/21,356.36 = 8,762.88/x
  3. Step 3: Cross multiply
    15,478.19x = 21,356.36 × 8,762.88
  4. Step 4: Simplify right side
    15,478.19x = 187,143,289.05
  5. Step 5: Solve for x
    x = 187,143,289.05/15,478.19
  6. Step 6: Final answer
    x = 12,090.77

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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.