Home / 20,703.84-28,562.40-13,807.20

Finding the Fourth Proportional to 20,703.84, 28,562.40 and 13,807.20

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Solution

The fourth proportional to 20,703.84, 28,562.40 and 13,807.20 is: 19,048.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.84 : 28,562.40 = 13,807.20 : x
  2. Step 2: Convert to fraction form
    20,703.84/28,562.40 = 13,807.20/x
  3. Step 3: Cross multiply
    20,703.84x = 28,562.40 × 13,807.20
  4. Step 4: Simplify right side
    20,703.84x = 394,366,769.28
  5. Step 5: Solve for x
    x = 394,366,769.28/20,703.84
  6. Step 6: Final answer
    x = 19,048.00

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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.