Home / 15,088.88-20,823.48-9,120.52

Finding the Fourth Proportional to 15,088.88, 20,823.48 and 9,120.52

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Solution

The fourth proportional to 15,088.88, 20,823.48 and 9,120.52 is: 12,586.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,088.88 : 20,823.48 = 9,120.52 : x
  2. Step 2: Convert to fraction form
    15,088.88/20,823.48 = 9,120.52/x
  3. Step 3: Cross multiply
    15,088.88x = 20,823.48 × 9,120.52
  4. Step 4: Simplify right side
    15,088.88x = 189,920,965.81
  5. Step 5: Solve for x
    x = 189,920,965.81/15,088.88
  6. Step 6: Final answer
    x = 12,586.82

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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.