Home / 20,802.02-28,712.68-12,307.10

Finding the Fourth Proportional to 20,802.02, 28,712.68 and 12,307.10

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Solution

The fourth proportional to 20,802.02, 28,712.68 and 12,307.10 is: 16,987.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.02 : 28,712.68 = 12,307.10 : x
  2. Step 2: Convert to fraction form
    20,802.02/28,712.68 = 12,307.10/x
  3. Step 3: Cross multiply
    20,802.02x = 28,712.68 × 12,307.10
  4. Step 4: Simplify right side
    20,802.02x = 353,369,824.03
  5. Step 5: Solve for x
    x = 353,369,824.03/20,802.02
  6. Step 6: Final answer
    x = 16,987.28

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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.