Home / 20,642.40-28,485.45-11,210.94

Finding the Fourth Proportional to 20,642.40, 28,485.45 and 11,210.94

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Solution

The fourth proportional to 20,642.40, 28,485.45 and 11,210.94 is: 15,470.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.40 : 28,485.45 = 11,210.94 : x
  2. Step 2: Convert to fraction form
    20,642.40/28,485.45 = 11,210.94/x
  3. Step 3: Cross multiply
    20,642.40x = 28,485.45 × 11,210.94
  4. Step 4: Simplify right side
    20,642.40x = 319,348,670.82
  5. Step 5: Solve for x
    x = 319,348,670.82/20,642.40
  6. Step 6: Final answer
    x = 15,470.52

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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.