Home / 20,698.85-28,510.00-15,909.63

Finding the Fourth Proportional to 20,698.85, 28,510.00 and 15,909.63

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Solution

The fourth proportional to 20,698.85, 28,510.00 and 15,909.63 is: 21,913.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.85 : 28,510.00 = 15,909.63 : x
  2. Step 2: Convert to fraction form
    20,698.85/28,510.00 = 15,909.63/x
  3. Step 3: Cross multiply
    20,698.85x = 28,510.00 × 15,909.63
  4. Step 4: Simplify right side
    20,698.85x = 453,583,582.80
  5. Step 5: Solve for x
    x = 453,583,582.80/20,698.85
  6. Step 6: Final answer
    x = 21,913.47

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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.