Home / 27,756.02-38,256.65-21,039.50

Finding the Fourth Proportional to 27,756.02, 38,256.65 and 21,039.50

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Solution

The fourth proportional to 27,756.02, 38,256.65 and 21,039.50 is: 28,999.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,756.02 : 38,256.65 = 21,039.50 : x
  2. Step 2: Convert to fraction form
    27,756.02/38,256.65 = 21,039.50/x
  3. Step 3: Cross multiply
    27,756.02x = 38,256.65 × 21,039.50
  4. Step 4: Simplify right side
    27,756.02x = 804,900,491.19
  5. Step 5: Solve for x
    x = 804,900,491.19/27,756.02
  6. Step 6: Final answer
    x = 28,999.14

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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.