Home / 20,655.07-28,505.72-12,699.25

Finding the Fourth Proportional to 20,655.07, 28,505.72 and 12,699.25

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Solution

The fourth proportional to 20,655.07, 28,505.72 and 12,699.25 is: 17,526.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.07 : 28,505.72 = 12,699.25 : x
  2. Step 2: Convert to fraction form
    20,655.07/28,505.72 = 12,699.25/x
  3. Step 3: Cross multiply
    20,655.07x = 28,505.72 × 12,699.25
  4. Step 4: Simplify right side
    20,655.07x = 362,001,264.71
  5. Step 5: Solve for x
    x = 362,001,264.71/20,655.07
  6. Step 6: Final answer
    x = 17,526.02

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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.