Home / 15,289.86-21,095.03-8,915.00

Finding the Fourth Proportional to 15,289.86, 21,095.03 and 8,915.00

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Solution

The fourth proportional to 15,289.86, 21,095.03 and 8,915.00 is: 12,299.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,289.86 : 21,095.03 = 8,915.00 : x
  2. Step 2: Convert to fraction form
    15,289.86/21,095.03 = 8,915.00/x
  3. Step 3: Cross multiply
    15,289.86x = 21,095.03 × 8,915.00
  4. Step 4: Simplify right side
    15,289.86x = 188,062,267.48
  5. Step 5: Solve for x
    x = 188,062,267.48/15,289.86
  6. Step 6: Final answer
    x = 12,299.80

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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.