Home / 19,428.72-26,811.36-10,931.28

Finding the Fourth Proportional to 19,428.72, 26,811.36 and 10,931.28

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Solution

The fourth proportional to 19,428.72, 26,811.36 and 10,931.28 is: 15,085.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,428.72 : 26,811.36 = 10,931.28 : x
  2. Step 2: Convert to fraction form
    19,428.72/26,811.36 = 10,931.28/x
  3. Step 3: Cross multiply
    19,428.72x = 26,811.36 × 10,931.28
  4. Step 4: Simplify right side
    19,428.72x = 293,082,483.34
  5. Step 5: Solve for x
    x = 293,082,483.34/19,428.72
  6. Step 6: Final answer
    x = 15,085.01

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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.