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Finding the Fourth Proportional to 28,307.99, 39,065.15 and 15,562.00

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Solution

The fourth proportional to 28,307.99, 39,065.15 and 15,562.00 is: 21,475.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,307.99 : 39,065.15 = 15,562.00 : x
  2. Step 2: Convert to fraction form
    28,307.99/39,065.15 = 15,562.00/x
  3. Step 3: Cross multiply
    28,307.99x = 39,065.15 × 15,562.00
  4. Step 4: Simplify right side
    28,307.99x = 607,931,751.39
  5. Step 5: Solve for x
    x = 607,931,751.39/28,307.99
  6. Step 6: Final answer
    x = 21,475.62

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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.