Home / 28,210.95-38,931.03-15,635.70

Finding the Fourth Proportional to 28,210.95, 38,931.03 and 15,635.70

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Solution

The fourth proportional to 28,210.95, 38,931.03 and 15,635.70 is: 21,577.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,210.95 : 38,931.03 = 15,635.70 : x
  2. Step 2: Convert to fraction form
    28,210.95/38,931.03 = 15,635.70/x
  3. Step 3: Cross multiply
    28,210.95x = 38,931.03 × 15,635.70
  4. Step 4: Simplify right side
    28,210.95x = 608,713,905.77
  5. Step 5: Solve for x
    x = 608,713,905.77/28,210.95
  6. Step 6: Final answer
    x = 21,577.22

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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.