Home / 28,681.11-39,578.55-15,935.10

Finding the Fourth Proportional to 28,681.11, 39,578.55 and 15,935.10

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Solution

The fourth proportional to 28,681.11, 39,578.55 and 15,935.10 is: 21,989.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,681.11 : 39,578.55 = 15,935.10 : x
  2. Step 2: Convert to fraction form
    28,681.11/39,578.55 = 15,935.10/x
  3. Step 3: Cross multiply
    28,681.11x = 39,578.55 × 15,935.10
  4. Step 4: Simplify right side
    28,681.11x = 630,688,152.11
  5. Step 5: Solve for x
    x = 630,688,152.11/28,681.11
  6. Step 6: Final answer
    x = 21,989.67

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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.