Home / 28,309.66-39,068.08-15,389.80

Finding the Fourth Proportional to 28,309.66, 39,068.08 and 15,389.80

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Solution

The fourth proportional to 28,309.66, 39,068.08 and 15,389.80 is: 21,238.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,309.66 : 39,068.08 = 15,389.80 : x
  2. Step 2: Convert to fraction form
    28,309.66/39,068.08 = 15,389.80/x
  3. Step 3: Cross multiply
    28,309.66x = 39,068.08 × 15,389.80
  4. Step 4: Simplify right side
    28,309.66x = 601,249,937.58
  5. Step 5: Solve for x
    x = 601,249,937.58/28,309.66
  6. Step 6: Final answer
    x = 21,238.34

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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.