Home / 28,345.16-39,116.36-15,769.91

Finding the Fourth Proportional to 28,345.16, 39,116.36 and 15,769.91

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Solution

The fourth proportional to 28,345.16, 39,116.36 and 15,769.91 is: 21,762.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,345.16 : 39,116.36 = 15,769.91 : x
  2. Step 2: Convert to fraction form
    28,345.16/39,116.36 = 15,769.91/x
  3. Step 3: Cross multiply
    28,345.16x = 39,116.36 × 15,769.91
  4. Step 4: Simplify right side
    28,345.16x = 616,861,613.94
  5. Step 5: Solve for x
    x = 616,861,613.94/28,345.16
  6. Step 6: Final answer
    x = 21,762.50

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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.