Home / 28,569.08-39,428.70-15,991.40

Finding the Fourth Proportional to 28,569.08, 39,428.70 and 15,991.40

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Solution

The fourth proportional to 28,569.08, 39,428.70 and 15,991.40 is: 22,070.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,569.08 : 39,428.70 = 15,991.40 : x
  2. Step 2: Convert to fraction form
    28,569.08/39,428.70 = 15,991.40/x
  3. Step 3: Cross multiply
    28,569.08x = 39,428.70 × 15,991.40
  4. Step 4: Simplify right side
    28,569.08x = 630,520,113.18
  5. Step 5: Solve for x
    x = 630,520,113.18/28,569.08
  6. Step 6: Final answer
    x = 22,070.02

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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.