Finding the Fourth Proportional to 28,839,642.46, 39,798,813.99 and 15,788,115.80
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Solution
The fourth proportional to 28,839,642.46, 39,798,813.99 and 15,788,115.80 is: 21,787,658.60
Step by Step Solution
- Step 1: Write the proportion equation
28,839,642.46 : 39,798,813.99 = 15,788,115.80 : x - Step 2: Convert to fraction form
28,839,642.46/39,798,813.99 = 15,788,115.80/x - Step 3: Cross multiply
28,839,642.46x = 39,798,813.99 × 15,788,115.80 - Step 4: Simplify right side
28,839,642.46x = 628,348,283,875,214.88 - Step 5: Solve for x
x = 628,348,283,875,214.88/28,839,642.46 - Step 6: Final answer
x = 21,787,658.60
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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.