Home / 15,851.93-21,875.65-8,778.34

Finding the Fourth Proportional to 15,851.93, 21,875.65 and 8,778.34

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Solution

The fourth proportional to 15,851.93, 21,875.65 and 8,778.34 is: 12,114.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.93 : 21,875.65 = 8,778.34 : x
  2. Step 2: Convert to fraction form
    15,851.93/21,875.65 = 8,778.34/x
  3. Step 3: Cross multiply
    15,851.93x = 21,875.65 × 8,778.34
  4. Step 4: Simplify right side
    15,851.93x = 192,031,898.82
  5. Step 5: Solve for x
    x = 192,031,898.82/15,851.93
  6. Step 6: Final answer
    x = 12,114.11

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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.