Home / 15,612.86-21,545.74-8,539.28

Finding the Fourth Proportional to 15,612.86, 21,545.74 and 8,539.28

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Solution

The fourth proportional to 15,612.86, 21,545.74 and 8,539.28 is: 11,784.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,612.86 : 21,545.74 = 8,539.28 : x
  2. Step 2: Convert to fraction form
    15,612.86/21,545.74 = 8,539.28/x
  3. Step 3: Cross multiply
    15,612.86x = 21,545.74 × 8,539.28
  4. Step 4: Simplify right side
    15,612.86x = 183,985,106.67
  5. Step 5: Solve for x
    x = 183,985,106.67/15,612.86
  6. Step 6: Final answer
    x = 11,784.20

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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.