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Finding the Fourth Proportional to 28,655.48, 42,983.01 and 15,590.90

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Solution

The fourth proportional to 28,655.48, 42,983.01 and 15,590.90 is: 23,386.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,655.48 : 42,983.01 = 15,590.90 : x
  2. Step 2: Convert to fraction form
    28,655.48/42,983.01 = 15,590.90/x
  3. Step 3: Cross multiply
    28,655.48x = 42,983.01 × 15,590.90
  4. Step 4: Simplify right side
    28,655.48x = 670,143,595.69
  5. Step 5: Solve for x
    x = 670,143,595.69/28,655.48
  6. Step 6: Final answer
    x = 23,386.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.