Home / 28,117.77-38,802.74-15,370.80

Finding the Fourth Proportional to 28,117.77, 38,802.74 and 15,370.80

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Solution

The fourth proportional to 28,117.77, 38,802.74 and 15,370.80 is: 21,211.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,117.77 : 38,802.74 = 15,370.80 : x
  2. Step 2: Convert to fraction form
    28,117.77/38,802.74 = 15,370.80/x
  3. Step 3: Cross multiply
    28,117.77x = 38,802.74 × 15,370.80
  4. Step 4: Simplify right side
    28,117.77x = 596,429,079.14
  5. Step 5: Solve for x
    x = 596,429,079.14/28,117.77
  6. Step 6: Final answer
    x = 21,211.82

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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.