Home / 15,783.02-21,781.14-9,068.84

Finding the Fourth Proportional to 15,783.02, 21,781.14 and 9,068.84

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Solution

The fourth proportional to 15,783.02, 21,781.14 and 9,068.84 is: 12,515.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,783.02 : 21,781.14 = 9,068.84 : x
  2. Step 2: Convert to fraction form
    15,783.02/21,781.14 = 9,068.84/x
  3. Step 3: Cross multiply
    15,783.02x = 21,781.14 × 9,068.84
  4. Step 4: Simplify right side
    15,783.02x = 197,529,673.68
  5. Step 5: Solve for x
    x = 197,529,673.68/15,783.02
  6. Step 6: Final answer
    x = 12,515.33

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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.