Home / 28,890.42-39,870.63-16,143.64

Finding the Fourth Proportional to 28,890.42, 39,870.63 and 16,143.64

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Solution

The fourth proportional to 28,890.42, 39,870.63 and 16,143.64 is: 22,279.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,890.42 : 39,870.63 = 16,143.64 : x
  2. Step 2: Convert to fraction form
    28,890.42/39,870.63 = 16,143.64/x
  3. Step 3: Cross multiply
    28,890.42x = 39,870.63 × 16,143.64
  4. Step 4: Simplify right side
    28,890.42x = 643,657,097.29
  5. Step 5: Solve for x
    x = 643,657,097.29/28,890.42
  6. Step 6: Final answer
    x = 22,279.26

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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.