Home / 28,567.78-39,423.65-15,820.68

Finding the Fourth Proportional to 28,567.78, 39,423.65 and 15,820.68

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Solution

The fourth proportional to 28,567.78, 39,423.65 and 15,820.68 is: 21,832.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,567.78 : 39,423.65 = 15,820.68 : x
  2. Step 2: Convert to fraction form
    28,567.78/39,423.65 = 15,820.68/x
  3. Step 3: Cross multiply
    28,567.78x = 39,423.65 × 15,820.68
  4. Step 4: Simplify right side
    28,567.78x = 623,709,019.82
  5. Step 5: Solve for x
    x = 623,709,019.82/28,567.78
  6. Step 6: Final answer
    x = 21,832.60

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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.