Home / 20,802.65-28,721.51-12,307.50

Finding the Fourth Proportional to 20,802.65, 28,721.51 and 12,307.50

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Solution

The fourth proportional to 20,802.65, 28,721.51 and 12,307.50 is: 16,992.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.65 : 28,721.51 = 12,307.50 : x
  2. Step 2: Convert to fraction form
    20,802.65/28,721.51 = 12,307.50/x
  3. Step 3: Cross multiply
    20,802.65x = 28,721.51 × 12,307.50
  4. Step 4: Simplify right side
    20,802.65x = 353,489,922.79
  5. Step 5: Solve for x
    x = 353,489,922.79/20,802.65
  6. Step 6: Final answer
    x = 16,992.55

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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.