Home / 28,567.76-39,421.32-15,990.80

Finding the Fourth Proportional to 28,567.76, 39,421.32 and 15,990.80

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Solution

The fourth proportional to 28,567.76, 39,421.32 and 15,990.80 is: 22,066.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,567.76 : 39,421.32 = 15,990.80 : x
  2. Step 2: Convert to fraction form
    28,567.76/39,421.32 = 15,990.80/x
  3. Step 3: Cross multiply
    28,567.76x = 39,421.32 × 15,990.80
  4. Step 4: Simplify right side
    28,567.76x = 630,378,443.86
  5. Step 5: Solve for x
    x = 630,378,443.86/28,567.76
  6. Step 6: Final answer
    x = 22,066.08

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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.