Home / 20,656.07-28,507.10-12,700.25

Finding the Fourth Proportional to 20,656.07, 28,507.10 and 12,700.25

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Solution

The fourth proportional to 20,656.07, 28,507.10 and 12,700.25 is: 17,527.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.07 : 28,507.10 = 12,700.25 : x
  2. Step 2: Convert to fraction form
    20,656.07/28,507.10 = 12,700.25/x
  3. Step 3: Cross multiply
    20,656.07x = 28,507.10 × 12,700.25
  4. Step 4: Simplify right side
    20,656.07x = 362,047,296.78
  5. Step 5: Solve for x
    x = 362,047,296.78/20,656.07
  6. Step 6: Final answer
    x = 17,527.40

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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.