Finding the Fourth Proportional to 19,249,947.60, 28,874,921.40 and 19,117,237.20
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Solution
The fourth proportional to 19,249,947.60, 28,874,921.40 and 19,117,237.20 is: 28,675,855.80
Step by Step Solution
- Step 1: Write the proportion equation
19,249,947.60 : 28,874,921.40 = 19,117,237.20 : x - Step 2: Convert to fraction form
19,249,947.60/28,874,921.40 = 19,117,237.20/x - Step 3: Cross multiply
19,249,947.60x = 28,874,921.40 × 19,117,237.20 - Step 4: Simplify right side
19,249,947.60x = 552,008,721,535,156 - Step 5: Solve for x
x = 552,008,721,535,156/19,249,947.60 - Step 6: Final answer
x = 28,675,855.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.