Home / 28,455.81-39,271.19-15,711.45

Finding the Fourth Proportional to 28,455.81, 39,271.19 and 15,711.45

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Solution

The fourth proportional to 28,455.81, 39,271.19 and 15,711.45 is: 21,683.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.81 : 39,271.19 = 15,711.45 : x
  2. Step 2: Convert to fraction form
    28,455.81/39,271.19 = 15,711.45/x
  3. Step 3: Cross multiply
    28,455.81x = 39,271.19 × 15,711.45
  4. Step 4: Simplify right side
    28,455.81x = 617,007,338.13
  5. Step 5: Solve for x
    x = 617,007,338.13/28,455.81
  6. Step 6: Final answer
    x = 21,683.00

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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.