Home / 20,155.55-27,827.11-12,988.00

Finding the Fourth Proportional to 20,155.55, 27,827.11 and 12,988.00

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Solution

The fourth proportional to 20,155.55, 27,827.11 and 12,988.00 is: 17,931.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.55 : 27,827.11 = 12,988.00 : x
  2. Step 2: Convert to fraction form
    20,155.55/27,827.11 = 12,988.00/x
  3. Step 3: Cross multiply
    20,155.55x = 27,827.11 × 12,988.00
  4. Step 4: Simplify right side
    20,155.55x = 361,418,300.60
  5. Step 5: Solve for x
    x = 361,418,300.60/20,155.55
  6. Step 6: Final answer
    x = 17,931.45

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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.