Home / 15,639.84-21,602.16-12,659.04

Finding the Fourth Proportional to 15,639.84, 21,602.16 and 12,659.04

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Solution

The fourth proportional to 15,639.84, 21,602.16 and 12,659.04 is: 17,485.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,639.84 : 21,602.16 = 12,659.04 : x
  2. Step 2: Convert to fraction form
    15,639.84/21,602.16 = 12,659.04/x
  3. Step 3: Cross multiply
    15,639.84x = 21,602.16 × 12,659.04
  4. Step 4: Simplify right side
    15,639.84x = 273,462,607.53
  5. Step 5: Solve for x
    x = 273,462,607.53/15,639.84
  6. Step 6: Final answer
    x = 17,485.00

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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.