Home / 15,686.02-21,646.74-8,612.90

Finding the Fourth Proportional to 15,686.02, 21,646.74 and 8,612.90

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Solution

The fourth proportional to 15,686.02, 21,646.74 and 8,612.90 is: 11,885.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.02 : 21,646.74 = 8,612.90 : x
  2. Step 2: Convert to fraction form
    15,686.02/21,646.74 = 8,612.90/x
  3. Step 3: Cross multiply
    15,686.02x = 21,646.74 × 8,612.90
  4. Step 4: Simplify right side
    15,686.02x = 186,441,206.95
  5. Step 5: Solve for x
    x = 186,441,206.95/15,686.02
  6. Step 6: Final answer
    x = 11,885.82

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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.