Home / 15,851.37-21,875.36-8,777.91

Finding the Fourth Proportional to 15,851.37, 21,875.36 and 8,777.91

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Solution

The fourth proportional to 15,851.37, 21,875.36 and 8,777.91 is: 12,113.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.37 : 21,875.36 = 8,777.91 : x
  2. Step 2: Convert to fraction form
    15,851.37/21,875.36 = 8,777.91/x
  3. Step 3: Cross multiply
    15,851.37x = 21,875.36 × 8,777.91
  4. Step 4: Simplify right side
    15,851.37x = 192,019,897.41
  5. Step 5: Solve for x
    x = 192,019,897.41/15,851.37
  6. Step 6: Final answer
    x = 12,113.77

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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.