Home / 28,901.80-39,918.18-19,455.40

Finding the Fourth Proportional to 28,901.80, 39,918.18 and 19,455.40

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Solution

The fourth proportional to 28,901.80, 39,918.18 and 19,455.40 is: 26,871.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,901.80 : 39,918.18 = 19,455.40 : x
  2. Step 2: Convert to fraction form
    28,901.80/39,918.18 = 19,455.40/x
  3. Step 3: Cross multiply
    28,901.80x = 39,918.18 × 19,455.40
  4. Step 4: Simplify right side
    28,901.80x = 776,624,159.17
  5. Step 5: Solve for x
    x = 776,624,159.17/28,901.80
  6. Step 6: Final answer
    x = 26,871.13

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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.