Home / 28,284.04-39,030.89-15,709.60

Finding the Fourth Proportional to 28,284.04, 39,030.89 and 15,709.60

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Solution

The fourth proportional to 28,284.04, 39,030.89 and 15,709.60 is: 21,678.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,284.04 : 39,030.89 = 15,709.60 : x
  2. Step 2: Convert to fraction form
    28,284.04/39,030.89 = 15,709.60/x
  3. Step 3: Cross multiply
    28,284.04x = 39,030.89 × 15,709.60
  4. Step 4: Simplify right side
    28,284.04x = 613,159,395.84
  5. Step 5: Solve for x
    x = 613,159,395.84/28,284.04
  6. Step 6: Final answer
    x = 21,678.64

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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.