Home / 13,920.69-19,210.77-7,547.40

Finding the Fourth Proportional to 13,920.69, 19,210.77 and 7,547.40

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Solution

The fourth proportional to 13,920.69, 19,210.77 and 7,547.40 is: 10,415.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.69 : 19,210.77 = 7,547.40 : x
  2. Step 2: Convert to fraction form
    13,920.69/19,210.77 = 7,547.40/x
  3. Step 3: Cross multiply
    13,920.69x = 19,210.77 × 7,547.40
  4. Step 4: Simplify right side
    13,920.69x = 144,991,365.50
  5. Step 5: Solve for x
    x = 144,991,365.50/13,920.69
  6. Step 6: Final answer
    x = 10,415.53

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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.