Home / 28,070.40-38,739.80-16,140.72

Finding the Fourth Proportional to 28,070.40, 38,739.80 and 16,140.72

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Solution

The fourth proportional to 28,070.40, 38,739.80 and 16,140.72 is: 22,275.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,070.40 : 38,739.80 = 16,140.72 : x
  2. Step 2: Convert to fraction form
    28,070.40/38,739.80 = 16,140.72/x
  3. Step 3: Cross multiply
    28,070.40x = 38,739.80 × 16,140.72
  4. Step 4: Simplify right side
    28,070.40x = 625,288,264.66
  5. Step 5: Solve for x
    x = 625,288,264.66/28,070.40
  6. Step 6: Final answer
    x = 22,275.72

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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.