Home / 27,856.85-38,445.08-15,917.87

Finding the Fourth Proportional to 27,856.85, 38,445.08 and 15,917.87

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Solution

The fourth proportional to 27,856.85, 38,445.08 and 15,917.87 is: 21,968.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,856.85 : 38,445.08 = 15,917.87 : x
  2. Step 2: Convert to fraction form
    27,856.85/38,445.08 = 15,917.87/x
  3. Step 3: Cross multiply
    27,856.85x = 38,445.08 × 15,917.87
  4. Step 4: Simplify right side
    27,856.85x = 611,963,802.10
  5. Step 5: Solve for x
    x = 611,963,802.10/27,856.85
  6. Step 6: Final answer
    x = 21,968.17

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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.