Home / 28,085.28-38,756.64-15,509.76

Finding the Fourth Proportional to 28,085.28, 38,756.64 and 15,509.76

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Solution

The fourth proportional to 28,085.28, 38,756.64 and 15,509.76 is: 21,402.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085.28 : 38,756.64 = 15,509.76 : x
  2. Step 2: Convert to fraction form
    28,085.28/38,756.64 = 15,509.76/x
  3. Step 3: Cross multiply
    28,085.28x = 38,756.64 × 15,509.76
  4. Step 4: Simplify right side
    28,085.28x = 601,106,184.81
  5. Step 5: Solve for x
    x = 601,106,184.81/28,085.28
  6. Step 6: Final answer
    x = 21,402.89

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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.