Home / 15,686.04-21,646.80-8,612.58

Finding the Fourth Proportional to 15,686.04, 21,646.80 and 8,612.58

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Solution

The fourth proportional to 15,686.04, 21,646.80 and 8,612.58 is: 11,885.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.04 : 21,646.80 = 8,612.58 : x
  2. Step 2: Convert to fraction form
    15,686.04/21,646.80 = 8,612.58/x
  3. Step 3: Cross multiply
    15,686.04x = 21,646.80 × 8,612.58
  4. Step 4: Simplify right side
    15,686.04x = 186,434,796.74
  5. Step 5: Solve for x
    x = 186,434,796.74/15,686.04
  6. Step 6: Final answer
    x = 11,885.40

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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.